diff --git a/.gitignore b/.gitignore
index 2c15bab..8e95f74 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,7 +27,6 @@ npm-debug.log
 NOTES
 coverage/
 dist/
-tools/
 
 # Apple
 .DS_Store
diff --git a/tools/clear.sh b/tools/clear.sh
new file mode 100755
index 0000000..a683c3f
--- /dev/null
+++ b/tools/clear.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+mosquitto_sub -h mosquitto.graystorm.com -v -t '#' --retained-only \
+  | grep 'amcrest2mqtt' \
+  | while read -r topic payload ; do
+      mosquitto_pub -h mosquitto.graystorm.com -t "$topic" -n -r
+      echo "Purged $topic"
+    done
+echo "done."