diff --git a/cmd/dcbot/internal/run/run.go b/cmd/dcbot/internal/run/run.go
index 79f5f52..7e5d3b6 100644
--- a/cmd/dcbot/internal/run/run.go
+++ b/cmd/dcbot/internal/run/run.go
@@ -47,7 +47,12 @@ func New() *cli.Command {
 			monitorRepo := bundb.NewMonitor(db)
 
 			choiceSvc := service.NewChoice(client)
-			groupSvc := service.NewGroup(groupRepo, client, cfg.MaxGroupsPerServer)
+			groupSvc := service.NewGroup(
+				groupRepo,
+				client,
+				logger,
+				cfg.MaxGroupsPerServer,
+			)
 			monitorSvc := service.NewMonitor(
 				monitorRepo,
 				groupRepo,
diff --git a/internal/bundb/group.go b/internal/bundb/group.go
index 33cb1f2..a51fab6 100644
--- a/internal/bundb/group.go
+++ b/internal/bundb/group.go
@@ -130,6 +130,18 @@ func (g *Group) Delete(ctx context.Context, id, serverID string) error {
 	return nil
 }
 
+func (g *Group) DeleteMany(ctx context.Context, id ...string) error {
+	_, err := g.db.NewDelete().
+		Model(&model.Group{}).
+		Returning("NULL").
+		Where("id IN (?)", id).
+		Exec(ctx)
+	if err != nil && !errors.Is(err, sql.ErrNoRows) {
+		return fmt.Errorf("couldn't delete groups: %w", err)
+	}
+	return nil
+}
+
 type updateGroupsParamsApplier struct {
 	params domain.UpdateGroupParams
 }
diff --git a/internal/domain/group.go b/internal/domain/group.go
index debb4f0..f56fca7 100644
--- a/internal/domain/group.go
+++ b/internal/domain/group.go
@@ -105,9 +105,16 @@ func (u UpdateGroupParams) IsZero() bool {
 		!u.Barbarians.Valid
 }
 
+type ListGroupsParamsTWServer struct {
+	VersionCode string
+	ServerKey   string
+}
+
 type ListGroupsParams struct {
-	ServerIDs            []string
-	EnabledNotifications NullBool // check if ChannelGains != null && ChannelLosses != null
+	ServerIDs            []string                   // DC server IDs
+	Servers              []ListGroupsParamsTWServer // version codes + tw server keys
+	EnabledNotifications NullBool                   // check if ChannelGains != null && ChannelLosses != null
+	CreatedAtLTE         time.Time
 }
 
 type GroupLimitReachedError struct {
diff --git a/internal/service/group.go b/internal/service/group.go
index 21cd745..f327336 100644
--- a/internal/service/group.go
+++ b/internal/service/group.go
@@ -4,9 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"time"
 
 	"gitea.dwysokinski.me/twhelp/dcbot/internal/domain"
 	"gitea.dwysokinski.me/twhelp/dcbot/internal/twhelp"
+	"go.uber.org/zap"
 )
 
 //counterfeiter:generate -o internal/mock/group_repository.gen.go . GroupRepository
@@ -16,18 +18,21 @@ type GroupRepository interface {
 	List(ctx context.Context, params domain.ListGroupsParams) ([]domain.Group, error)
 	Get(ctx context.Context, id, serverID string) (domain.Group, error)
 	Delete(ctx context.Context, id, serverID string) error
+	DeleteMany(ctx context.Context, id ...string) error
 }
 
 type Group struct {
 	repo               GroupRepository
 	client             TWHelpClient
+	logger             *zap.Logger
 	maxGroupsPerServer int
 }
 
-func NewGroup(repo GroupRepository, client TWHelpClient, maxGroupsPerServer int) *Group {
+func NewGroup(repo GroupRepository, client TWHelpClient, logger *zap.Logger, maxGroupsPerServer int) *Group {
 	return &Group{
 		repo:               repo,
 		client:             client,
+		logger:             logger,
 		maxGroupsPerServer: maxGroupsPerServer,
 	}
 }
@@ -59,6 +64,29 @@ func (g *Group) Create(ctx context.Context, params domain.CreateGroupParams) (do
 	return group, nil
 }
 
+func (g *Group) checkTWServer(ctx context.Context, versionCode, serverKey string) error {
+	server, err := g.client.GetServer(ctx, versionCode, serverKey)
+	if err != nil {
+		var apiErr twhelp.APIError
+		if !errors.As(err, &apiErr) {
+			return fmt.Errorf("TWHelpClient.GetServer: %w", err)
+		}
+		return domain.ServerDoesNotExistError{
+			VersionCode: versionCode,
+			Key:         serverKey,
+		}
+	}
+
+	if !server.Open {
+		return domain.ServerIsClosedError{
+			VersionCode: versionCode,
+			Key:         serverKey,
+		}
+	}
+
+	return nil
+}
+
 func (g *Group) SetChannelGains(ctx context.Context, id, serverID, channel string) (domain.Group, error) {
 	return g.update(ctx, id, serverID, domain.UpdateGroupParams{
 		ChannelGains: domain.NullString{
@@ -126,23 +154,88 @@ func (g *Group) Delete(ctx context.Context, id, serverID string) error {
 	return nil
 }
 
-func (g *Group) checkTWServer(ctx context.Context, versionCode, serverKey string) error {
-	server, err := g.client.GetServer(ctx, versionCode, serverKey)
-	if err != nil {
-		var apiErr twhelp.APIError
-		if !errors.As(err, &apiErr) {
-			return fmt.Errorf("TWHelpClient.GetServer: %w", err)
-		}
-		return domain.ServerDoesNotExistError{
-			VersionCode: versionCode,
-			Key:         serverKey,
-		}
+func (g *Group) CleanUp(ctx context.Context) error {
+	if err := g.cleanUpOldWithDisabledNotifications(ctx); err != nil {
+		return err
 	}
 
-	if !server.Open {
-		return domain.ServerIsClosedError{
-			VersionCode: versionCode,
-			Key:         serverKey,
+	if err := g.cleanUpOldWithClosedTWServers(ctx); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (g *Group) cleanUpOldWithDisabledNotifications(ctx context.Context) error {
+	groups, err := g.repo.List(ctx, domain.ListGroupsParams{
+		EnabledNotifications: domain.NullBool{
+			Bool:  false,
+			Valid: true,
+		},
+		CreatedAtLTE: time.Now().Add(-24 * time.Hour),
+	})
+	if err != nil {
+		return fmt.Errorf("GroupRepository.List: %w", err)
+	}
+
+	ids := make([]string, 0, len(groups))
+	for _, group := range groups {
+		ids = append(ids, group.ID)
+	}
+
+	if err = g.repo.DeleteMany(ctx, ids...); err != nil {
+		return fmt.Errorf("GroupRepository.DeleteMany: %w", err)
+	}
+
+	return nil
+}
+
+func (g *Group) cleanUpOldWithClosedTWServers(ctx context.Context) error {
+	versions, err := g.client.ListVersions(ctx)
+	if err != nil {
+		return fmt.Errorf("TWHelpClient.ListVersions: %w", err)
+	}
+
+	for _, v := range versions {
+		servers, err := g.client.ListServers(ctx, v.Code, twhelp.ListServersQueryParams{
+			Open: twhelp.NullBool{
+				Bool:  false,
+				Valid: true,
+			},
+		})
+		if err != nil {
+			g.logger.Warn("failed to fetch closed servers", zap.Error(err), zap.String("versionCode", v.Code))
+			continue
+		}
+
+		params := domain.ListGroupsParams{
+			Servers: make([]domain.ListGroupsParamsTWServer, 0, len(servers)),
+		}
+		for _, s := range servers {
+			params.Servers = append(params.Servers, domain.ListGroupsParamsTWServer{
+				VersionCode: v.Code,
+				ServerKey:   s.Key,
+			})
+		}
+
+		groups, err := g.repo.List(ctx, params)
+		if err != nil {
+			g.logger.Warn("failed to list groups", zap.Error(err), zap.String("versionCode", v.Code))
+			continue
+		}
+
+		ids := make([]string, 0, len(groups))
+		for _, group := range groups {
+			ids = append(ids, group.ID)
+		}
+
+		if err = g.repo.DeleteMany(ctx, ids...); err != nil {
+			g.logger.Warn(
+				"failed to delete groups",
+				zap.Error(err),
+				zap.String("versionCode", v.Code),
+			)
+			continue
 		}
 	}
 
diff --git a/internal/service/group_test.go b/internal/service/group_test.go
index d890bb1..73737cd 100644
--- a/internal/service/group_test.go
+++ b/internal/service/group_test.go
@@ -13,6 +13,7 @@ import (
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
 )
 
 func TestGroup_Create(t *testing.T) {
@@ -57,7 +58,7 @@ func TestGroup_Create(t *testing.T) {
 			}, nil
 		})
 
-		g, err := service.NewGroup(repo, client, 1).Create(context.Background(), params)
+		g, err := service.NewGroup(repo, client, zap.NewNop(), 1).Create(context.Background(), params)
 		assert.NoError(t, err)
 		assert.NotEmpty(t, g.ID)
 		assert.Equal(t, params.ServerID(), g.ServerID)
@@ -78,7 +79,7 @@ func TestGroup_Create(t *testing.T) {
 		repo := &mock.FakeGroupRepository{}
 		repo.ListReturns(make([]domain.Group, maxGroupsPerServer), nil)
 
-		g, err := service.NewGroup(repo, nil, maxGroupsPerServer).Create(context.Background(), params)
+		g, err := service.NewGroup(repo, nil, zap.NewNop(), maxGroupsPerServer).Create(context.Background(), params)
 		assert.ErrorIs(t, err, domain.GroupLimitReachedError{
 			Current: maxGroupsPerServer,
 			Limit:   maxGroupsPerServer,
@@ -100,7 +101,7 @@ func TestGroup_Create(t *testing.T) {
 			}
 		})
 
-		g, err := service.NewGroup(repo, client, 1).Create(context.Background(), params)
+		g, err := service.NewGroup(repo, client, zap.NewNop(), 1).Create(context.Background(), params)
 		assert.ErrorIs(t, err, domain.ServerDoesNotExistError{
 			VersionCode: params.VersionCode(),
 			Key:         params.ServerKey(),
@@ -123,7 +124,7 @@ func TestGroup_Create(t *testing.T) {
 			}, nil
 		})
 
-		g, err := service.NewGroup(repo, client, 1).Create(context.Background(), params)
+		g, err := service.NewGroup(repo, client, zap.NewNop(), 1).Create(context.Background(), params)
 		assert.ErrorIs(t, err, domain.ServerIsClosedError{
 			VersionCode: params.VersionCode(),
 			Key:         params.ServerKey(),
diff --git a/internal/service/service.go b/internal/service/service.go
index 9d072ad..c328c3d 100644
--- a/internal/service/service.go
+++ b/internal/service/service.go
@@ -11,6 +11,11 @@ import (
 //counterfeiter:generate -o internal/mock/twhelp_client.gen.go . TWHelpClient
 type TWHelpClient interface {
 	ListVersions(ctx context.Context) ([]twhelp.Version, error)
+	ListServers(
+		ctx context.Context,
+		version string,
+		params twhelp.ListServersQueryParams,
+	) ([]twhelp.Server, error)
 	GetServer(ctx context.Context, version, server string) (twhelp.Server, error)
 	GetTribeByID(ctx context.Context, version, server string, id int64) (twhelp.Tribe, error)
 	GetTribeByTag(ctx context.Context, version, server, tag string) (twhelp.Tribe, error)
diff --git a/internal/twhelp/client.go b/internal/twhelp/client.go
index 2ebb628..61f6eee 100644
--- a/internal/twhelp/client.go
+++ b/internal/twhelp/client.go
@@ -16,6 +16,7 @@ const (
 	defaultTimeout   = 10 * time.Second
 
 	endpointListVersions     = "/api/v1/versions"
+	endpointListServers      = "/api/v1/versions/%s/servers"
 	endpointGetServer        = "/api/v1/versions/%s/servers/%s"
 	endpointGetTribeByID     = "/api/v1/versions/%s/servers/%s/tribes/%d"
 	endpointGetTribeByTag    = "/api/v1/versions/%s/servers/%s/tribes/tag/%s"
@@ -64,6 +65,39 @@ func (c *Client) ListVersions(ctx context.Context) ([]Version, error) {
 	return resp.Data, nil
 }
 
+type ListServersQueryParams struct {
+	Limit  int32
+	Offset int32
+	Open   NullBool
+}
+
+func (c *Client) ListServers(
+	ctx context.Context,
+	version string,
+	params ListServersQueryParams,
+) ([]Server, error) {
+	q := url.Values{}
+
+	if params.Limit > 0 {
+		q.Set("limit", strconv.Itoa(int(params.Limit)))
+	}
+
+	if params.Offset > 0 {
+		q.Set("offset", strconv.Itoa(int(params.Offset)))
+	}
+
+	if params.Open.Valid {
+		q.Set("open", strconv.FormatBool(params.Open.Bool))
+	}
+
+	var resp listServersResp
+	if err := c.getJSON(ctx, fmt.Sprintf(endpointListServers, version)+"?"+q.Encode(), &resp); err != nil {
+		return nil, err
+	}
+
+	return resp.Data, nil
+}
+
 func (c *Client) GetServer(ctx context.Context, version, server string) (Server, error) {
 	var resp getServerResp
 	if err := c.getJSON(ctx, fmt.Sprintf(endpointGetServer, version, server), &resp); err != nil {
@@ -105,22 +139,26 @@ type ListEnnoblementsQueryParams struct {
 	Sort   []ListEnnoblementsSort
 }
 
-func (c *Client) ListEnnoblements(ctx context.Context, version, server string, queryParams ListEnnoblementsQueryParams) ([]Ennoblement, error) {
+func (c *Client) ListEnnoblements(
+	ctx context.Context,
+	version, server string,
+	params ListEnnoblementsQueryParams,
+) ([]Ennoblement, error) {
 	q := url.Values{}
 
-	if queryParams.Limit > 0 {
-		q.Set("limit", strconv.Itoa(int(queryParams.Limit)))
+	if params.Limit > 0 {
+		q.Set("limit", strconv.Itoa(int(params.Limit)))
 	}
 
-	if queryParams.Offset > 0 {
-		q.Set("offset", strconv.Itoa(int(queryParams.Offset)))
+	if params.Offset > 0 {
+		q.Set("offset", strconv.Itoa(int(params.Offset)))
 	}
 
-	if !queryParams.Since.IsZero() {
-		q.Set("since", queryParams.Since.Format(time.RFC3339))
+	if !params.Since.IsZero() {
+		q.Set("since", params.Since.Format(time.RFC3339))
 	}
 
-	for _, s := range queryParams.Sort {
+	for _, s := range params.Sort {
 		q.Add("sort", s.String())
 	}
 
diff --git a/internal/twhelp/twhelp.go b/internal/twhelp/twhelp.go
index fcf149f..33aa4ce 100644
--- a/internal/twhelp/twhelp.go
+++ b/internal/twhelp/twhelp.go
@@ -53,6 +53,10 @@ type getServerResp struct {
 	Data Server `json:"data"`
 }
 
+type listServersResp struct {
+	Data []Server `json:"data"`
+}
+
 type Tribe struct {
 	ID         int64     `json:"id"`
 	Tag        string    `json:"tag"`
@@ -152,3 +156,8 @@ type Ennoblement struct {
 type listEnnoblementsResp struct {
 	Data []Ennoblement `json:"data"`
 }
+
+type NullBool struct {
+	Bool  bool
+	Valid bool // Valid is true if Bool is not NULL
+}