diff --git a/bin/e-Paper_clean.service b/bin/e-Paper_clean.service
index 672512c..3e9bbf3 100644
--- a/bin/e-Paper_clean.service
+++ b/bin/e-Paper_clean.service
@@ -6,9 +6,10 @@ Before=reboot.target
 
 [Service]
 Type=oneshot
+ExecStartPre=/bin/bash -c "while pgrep -f '/usr/bin/python3 -u /root/2.13-Ink-screen-clock/bin/clean.py' > /dev/null; do sleep 1; done"
 ExecStart=/bin/bash /root/2.13-Ink-screen-clock/bin/clean.sh
 RemainAfterExit=yes
-TimeoutSec=5s
+TimeoutSec=0
 
 [Install]
 WantedBy=shutdown.target