diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index ee4f605..c9d9205 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -40,4 +40,14 @@ jobs:
           platforms: linux/amd64,linux/arm64
           tags: |
             ghcr.io/${{ github.repository_owner }}/moontv:latest
-            ghcr.io/${{ github.repository_owner }}/moontv:${{ github.sha }} 
\ No newline at end of file
+            ghcr.io/${{ github.repository_owner }}/moontv:${{ github.sha }} 
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Delete workflow runs
+        uses: Mattraks/delete-workflow-runs@main
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          repository: ${{ github.repository }}
+          retain_days: 0
+          keep_minimum_runs: 2
\ No newline at end of file
diff --git a/.github/workflows/sync.yml b/.github/workflows/sync.yml
index 160dd5d..b9ff148 100644
--- a/.github/workflows/sync.yml
+++ b/.github/workflows/sync.yml
@@ -5,7 +5,7 @@ permissions:
 
 on:
   schedule:
-    - cron: "0 4 * * *" # At 12PM UTC+8
+    - cron: "0 */6 * * *" # run every 6 hours
   workflow_dispatch:
 
 jobs:
@@ -33,4 +33,12 @@ jobs:
         if: failure()
         run: |
           echo "[Error] Due to a change in the workflow file of the upstream repository, GitHub has automatically suspended the scheduled automatic update. You need to manually sync your fork."
-          exit 1
\ No newline at end of file
+          exit 1
+
+      - name: Delete workflow runs
+        uses: Mattraks/delete-workflow-runs@main
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          repository: ${{ github.repository }}
+          retain_days: 0
+          keep_minimum_runs: 2
\ No newline at end of file