Thanks! Inside the timeout callback, you should also null out (or = 0) the timeout source id to avoid remove warnings. For example, here I modified [the example](https://gjs.guide/extensions/review-guidelines/review-guidelines.html#remove-main-loop-sources) for source remove: ```js function enable() { sourceId = GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, 5, () => { console.log('Source triggered'); sourceId = null; // <------- should be null out here too return GLib.SOURCE_REMOVE; }); } function disable() { if (sourceId) { GLib.Source.remove(sourceId); sourceId = null; } } ```