Originally Posted by Kelsey
Shiny side down; when the shisha is heated the shiny side will reflect heat better back onto the shisha keeping it hotter.
This doesn't really make sense to me. Shiny foil reflects light not heat. I don't think that shiny foil down will reflect heat back down. There really shouldn't be a huge a difference between the conductive properties of the different sides of the foil.(not trying to argue here, just never heard this before)
OT: I use two layers of foil and out of habit I put the first one shiny side down and the second one shiny side up. Just habit at this point not sure if there really is a noticeable difference between the sides of the foil.