Double Layer of foil, gives you better heat management.
If you want a washable hose, look at the Nammor hoses (Hookah-shisha.com) or you could also get this hose from their site:
try out some different tobaccos. There are several brands to try, pick and choose. Read the reviews to see what others are saying.
when you first get your hookah, wash it. New hookahs have residue on them that could effect the experience.