Over the past few years, charcoal screens have evolved to be more reliable and diverse regarding heat control. A charcoal container is placed on top of the bowl in place of aluminium foil. Heat can be easily controlled with these containers, commonly called metal screens. The vents can be opened or closed depending on how much heat you want.
You can be certain that no ash will be deposited in your tobacco when you use metal screens. You will experience unpleasant smoking experiences if you get ash in your tobacco. Meanwhile, hookah aluminium foil is less expensive than metal screens. Replacement and reusability are both possible with metal screens. Metal screens are also handy and reliable, so they are a good choice.
Hole sizes and numbers vary. Tobacco retains more heat due to larger holes because they have greater space between them, maintaining a constant temperature. By doing so, the tobacco is also prevented from acquiring an ashy taste due to the ash not getting into the tobacco. Heat can be hard to regulate in metal screens because they have large holes. Discolouration can also occur on metal screens, even if they continue to operate normally.