diff --git a/utils/cleanupDBs.js b/utils/cleanupDBs.js
index 723ec1c73..e0a42d946 100644
--- a/utils/cleanupDBs.js
+++ b/utils/cleanupDBs.js
@@ -28,7 +28,7 @@ async function main() {
       const mongoDatabases = await client.mongoDBResources.listMongoDBDatabases(resourceGroupName, account.name);
       for (const database of mongoDatabases) {
         // Unfortunately Mongo does not provide a timestamp in ARM. There is no way to tell how old the DB is other thn encoding it in the ID :(
-        const timestamp = Number(database.name.split("-")[1]);
+        const timestamp = Number(database.name.split("_").pop());
         if (timestamp && timestamp < thirtyMinutesAgo) {
           await client.mongoDBResources.deleteMongoDBDatabase(resourceGroupName, account.name, database.name);
           console.log(`DELETED: ${account.name} | ${database.name} | Age: ${friendlyTime(Date.now() - timestamp)}`);