wipe it down with vinegar, then go over it with a cloth dipped in olive oil. Go with the grain.

I clean with dish soap but have to dilute it in a bowl first.

Weiman Stainless Steel Cleaner
http://weiman.com/Products/Stainless-Steel

It is the only product that works. Buff in the same direction as the grain on the steel.

I was told to clean it with detergent soap and water but this leaves a film or streaks on stainless appliances in the kitchen. What is your method?