diff --git a/<Plug>_<Plug>_ b/<Plug>_<Plug>_
deleted file mode 100644
index 73eb21e..0000000
--- a/<Plug>_<Plug>_
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
-------------------------------------------------------------------------------------------------------------------------
-####### dune ####### Copyright (c) 2021-2022 losyme ################################################ MIT License #######
-------------------------------------------------------------------------------------------------------------------------
-*/
-
-package mongo
-
-import (
-	"time"
-
-	"forge.chapril.org/losyme/util"
-	"go.mongodb.org/mongo-driver/bson"
-	"go.mongodb.org/mongo-driver/mongo"
-)
-
-func (ms *mongoStorage) Clean() error {
-	ctx, cancel := util.CtxWithTimeout(10 * time.Second)
-	defer cancel()
-
-	session, err := ms.client.StartSession()
-	if err != nil {
-		return nil, err
-	}
-
-	defer session.EndSession(ctx)
-
-	_, err := session.WithTransaction(
-		ctx,
-		func(ctx mongo.SessionContext) (interface{}, error) {
-			_, err := ms.cJobs.DeleteMany(
-				ctx,
-				bson.M{
-					"workflow":    nil,
-					"finished_at": bson.M{"$lt": time.Now().Sub(ms.cleanAfter)},
-				},
-			)
-			if err != nil {
-				return nil, err
-			}
-		},
-	)
-
-	return err
-}
-
-/*
-######################################################################################################## @(°_°)@ #######
-*/
diff --git a/internal/storage/mongo/mongo.go b/internal/storage/mongo/mongo.go
index 9985dfe..96ab3f8 100644
--- a/internal/storage/mongo/mongo.go
+++ b/internal/storage/mongo/mongo.go
@@ -73,16 +73,16 @@ func New(cs *components.Components, cleanAfter time.Duration) (storage.Storage,
 	return ms, nil
 }
 
-func (ms *mongoStorage) Collection(name string) *mongo.Collection {
+func (ms *mongoStorage) collection(name string) *mongo.Collection {
 	return ms.db.Collection(name)
 }
 
 func (ms *mongoStorage) cJobs() *mongo.Collection {
-	return ms.Collection("jobs")
+	return ms.collection("jobs")
 }
 
 func (ms *mongoStorage) cWorkflows() *mongo.Collection {
-	return ms.Collection("workflows")
+	return ms.collection("workflows")
 }
 
 func (ms *mongoStorage) State() (*storage.State, error) {