Re: foil question, shiny side down?
The difference in reflectivity of the two sides is in the single digit percentages. Reflectivity only affects heat transfer by radiation which has very little effect when talking about charcoals used on hookahs. IOW, it doesn't matter which side you use. The only time it would matter is if you are using non-stick foil for some reason, in which case put the dull side down.