Re: Shisha stuck on the bowl
* Did you pack below the rim of your bowl? It should be packed like 1/8" below the rim to account for shisha expansion when heated/
* Did you make the foil tight enough? Drum tight? May have sagged due to coals on foil, putting it in touch with the shisha.
* Are you using a phunnel bowl? If so, the foil may droop some over that 15 mins and cover the center hole. Either prop the foil with the clip trick or the plastic tape around the phunnel bowl trick.