diff --git a/internal/config/module.go b/internal/config/module.go
index bda0215..5d4c6a4 100644
--- a/internal/config/module.go
+++ b/internal/config/module.go
@@ -8,6 +8,7 @@ import (
 	"github.com/capcom6/go-infra-fx/http"
 	"github.com/capcom6/sms-gateway/internal/sms-gateway/handlers"
 	"github.com/capcom6/sms-gateway/internal/sms-gateway/modules/auth"
+	"github.com/capcom6/sms-gateway/internal/sms-gateway/modules/devices"
 	"github.com/capcom6/sms-gateway/internal/sms-gateway/modules/messages"
 	"github.com/capcom6/sms-gateway/internal/sms-gateway/modules/push"
 	"go.uber.org/fx"
@@ -79,4 +80,9 @@ var Module = fx.Module(
 			ProcessedLifetime: 30 * 24 * time.Hour, //TODO: make it configurable
 		}
 	}),
+	fx.Provide(func(cfg Config) devices.Config {
+		return devices.Config{
+			UnusedLifetime: 365 * 24 * time.Hour, //TODO: make it configurable
+		}
+	}),
 )
diff --git a/internal/sms-gateway/modules/devices/config.go b/internal/sms-gateway/modules/devices/config.go
new file mode 100644
index 0000000..7495b3e
--- /dev/null
+++ b/internal/sms-gateway/modules/devices/config.go
@@ -0,0 +1,7 @@
+package devices
+
+import "time"
+
+type Config struct {
+	UnusedLifetime time.Duration
+}
diff --git a/internal/sms-gateway/modules/devices/module.go b/internal/sms-gateway/modules/devices/module.go
index e15b3ff..59ac8b2 100644
--- a/internal/sms-gateway/modules/devices/module.go
+++ b/internal/sms-gateway/modules/devices/module.go
@@ -1,10 +1,18 @@
 package devices
 
 import (
+	"github.com/capcom6/sms-gateway/internal/sms-gateway/modules/cleaner"
 	"go.uber.org/fx"
 	"go.uber.org/zap"
 )
 
+type FxResult struct {
+	fx.Out
+
+	Service   *Service
+	AsCleaner cleaner.Cleanable `group:"cleaners"`
+}
+
 var Module = fx.Module(
 	"devices",
 	fx.Decorate(func(log *zap.Logger) *zap.Logger {
@@ -14,7 +22,11 @@ var Module = fx.Module(
 		newDevicesRepository,
 		fx.Private,
 	),
-	fx.Provide(
-		NewService,
-	),
+	fx.Provide(func(p ServiceParams) FxResult {
+		svc := NewService(p)
+		return FxResult{
+			Service:   svc,
+			AsCleaner: svc,
+		}
+	}),
 )
diff --git a/internal/sms-gateway/modules/devices/repository.go b/internal/sms-gateway/modules/devices/repository.go
index 55f6b79..cfe826b 100644
--- a/internal/sms-gateway/modules/devices/repository.go
+++ b/internal/sms-gateway/modules/devices/repository.go
@@ -1,6 +1,7 @@
 package devices
 
 import (
+	"context"
 	"errors"
 	"time"
 
@@ -58,6 +59,15 @@ func (r *repository) UpdateLastSeen(id string) error {
 	return r.db.Model(&models.Device{}).Where("id", id).Update("last_seen", time.Now()).Error
 }
 
+func (r *repository) removeUnused(ctx context.Context, since time.Time) (int64, error) {
+	res := r.db.
+		WithContext(ctx).
+		Where("updated_at < ?", since).
+		Delete(&models.Device{})
+
+	return res.RowsAffected, res.Error
+}
+
 func newDevicesRepository(db *gorm.DB) *repository {
 	return &repository{
 		db: db,
diff --git a/internal/sms-gateway/modules/devices/service.go b/internal/sms-gateway/modules/devices/service.go
index dceac96..f44de74 100644
--- a/internal/sms-gateway/modules/devices/service.go
+++ b/internal/sms-gateway/modules/devices/service.go
@@ -1,6 +1,9 @@
 package devices
 
 import (
+	"context"
+	"time"
+
 	"github.com/capcom6/sms-gateway/internal/sms-gateway/models"
 	"github.com/capcom6/sms-gateway/internal/sms-gateway/modules/db"
 	"go.uber.org/fx"
@@ -10,6 +13,8 @@ import (
 type ServiceParams struct {
 	fx.In
 
+	Config Config
+
 	Devices *repository
 
 	IDGen db.IDGen
@@ -18,6 +23,8 @@ type ServiceParams struct {
 }
 
 type Service struct {
+	config Config
+
 	devices *repository
 
 	idGen db.IDGen
@@ -49,8 +56,16 @@ func (s *Service) UpdateLastSeen(deviceId string) error {
 	return s.devices.UpdateLastSeen(deviceId)
 }
 
+func (s *Service) Clean(ctx context.Context) error {
+	n, err := s.devices.removeUnused(ctx, time.Now().Add(-s.config.UnusedLifetime))
+
+	s.logger.Info("Cleaned unused devices", zap.Int64("count", n))
+	return err
+}
+
 func NewService(params ServiceParams) *Service {
 	return &Service{
+		config:  params.Config,
 		devices: params.Devices,
 		idGen:   params.IDGen,
 		logger:  params.Logger.Named("service"),