As stated before, you want to make sure that the shisha is packed a little bit below the rim of the bowl. And make sure that the foil is SUPER tight, otherwise it will sag down on top of the shisha and you'll end up with it stuck to the foil again. AF/SB/Nakhla/Layalina, are all good brands that you should try, they are very forgiving when it comes to heat management. You can also try searching around the videos section for more tips and tricks, as well. good luck!