New customer question

It's condensation forming at the top of the smoker, gets collected in vent and drips back. Just make sure there's no obstruction and that you've cleaned the inside top of the smoker if this has been happening a lot.

You can try setting a food can with both ends open over the vent hole. The moisture condenses on the can and stays on top of the smoker instead of dripping inside. I read about this somewhere on this forum and it works for me. You will end up with some gunk to clean off the top, but better there than inside on your barbeque.