There are several options that include mild soaps, window cleaners, soda water and white vinegar. Always use a soft cloth and if extra scrubbing is required, go with the grain. Yes, stainless steel does have a “grain”. Never use bleach or cleaners that are abrasive. Before using any of my suggestions I would encourage you look at the use and care manual for your appliance. To maintain your appliance warrantee, you should always follow the manufactures instructions. Also, they may also recommend a method to prevent additional fingerprints. These are not permanent solutions but there are some tips that will slow down the accumulation of fingerprints and save time removing them later.