Okey, in sort of order --
1a) Couple of different philosophies on that. Some say that, some say it doesn't matter. Take you best hold on whichever works best for you.
1b) You can try a plasma jet or soft-flame lighter.
2) It's always going to smell like that unless you don't build the cake. If you really have to do it you can keep the cake about the thickness of a dime or so.
3) You're doing it right, but choice if regular, fluffy, or bristle cleaners is up to you. Personally I do just use bristle, at least two, after each bowl.
4) Up to you; if it starts smoking yucky or you get too much gunk on the cleaners should work.
5) You can change after every smoke, every couple, or whenever it looks crappy.
We'll be here, ask away!