Re: Very small burn holes on my foil, should i be worried ?
When you poke your holes, does the utensil possibly come in contact with the shisha in the bowl? If it does, then it's pulling molasses and glycerin back through the hole with it, causing "burn" marks after heat is applied.
Also, make sure that you're using good quality foil. Some of the cheaper brands are coated with something that can cause burn marks, weird smells and foul tastes.
Try shifting your coals during smoking more. If you just let them sit in the same spot for hours, that may be why the foil is discoloring.