diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/debug/LabPageFragment.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/debug/LabPageFragment.kt
index 1c580968..5aae3c11 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/debug/LabPageFragment.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/debug/LabPageFragment.kt
@@ -62,6 +62,7 @@ class LabPageFragment : LazyFragment(), CoroutineScope {
             b.last10unseen.isVisible = false
             b.fullSync.isVisible = false
             b.clearProfile.isVisible = false
+            b.clearEndpointTimers.isVisible = false
             b.rodo.isVisible = false
             b.removeHomework.isVisible = false
             b.unarchive.isVisible = false
@@ -82,15 +83,19 @@ class LabPageFragment : LazyFragment(), CoroutineScope {
             app.db.teacherDao().query(SimpleSQLiteQuery("UPDATE teachers SET teacherSurname = \"\" WHERE profileId = ${App.profileId}"))
         }
         
-        b.fullSync.onClick { 
-            app.db.query(SimpleSQLiteQuery("UPDATE profiles SET empty = 1 WHERE profileId = ${App.profileId}"))
-            app.db.query(SimpleSQLiteQuery("DELETE FROM endpointTimers WHERE profileId = ${App.profileId}"))
+        b.fullSync.onClick {
+            app.profile.empty = true
+            app.profileSave()
         }
 
         b.clearProfile.onClick {
             ProfileRemoveDialog(activity, App.profileId, "FAKE", noProfileRemoval = true).show()
         }
 
+        b.clearEndpointTimers.onClick {
+            app.db.endpointTimerDao().clear(app.profileId)
+        }
+
         b.removeHomework.onClick {
             app.db.eventDao().getRawNow("UPDATE events SET homeworkBody = NULL WHERE profileId = ${App.profileId}")
         }
diff --git a/app/src/main/res/layout/lab_fragment.xml b/app/src/main/res/layout/lab_fragment.xml
index c1326fa3..d290525c 100644
--- a/app/src/main/res/layout/lab_fragment.xml
+++ b/app/src/main/res/layout/lab_fragment.xml
@@ -75,10 +75,17 @@
                 android:id="@+id/clearProfile"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginBottom="24dp"
                 android:text="Clear all profile data"
                 android:textAllCaps="false" />
 
+            <Button
+                android:id="@+id/clearEndpointTimers"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="24dp"
+                android:text="Clear endpoint timers (force full sync)"
+                android:textAllCaps="false" />
+
             <Button
                 android:id="@+id/rodo"
                 android:layout_width="match_parent"