You only need to apply hair wax, those moisturising kind. a bit
like those the salons put on your hair to steam the hair.
If you really want to apply something, maybe to help your pores
open further before you go in.
try some ginger kinda solutions. or buy direct from the suana spa
people, they should have something to sell you.
for suana, a swedish tradition way....try rubbing your body with
sea salt before you go into the suana.
the heat will help melt the sea salt on your body, and the salt
will doubly act as a exfloliant when you rub it on.