I have stainless steel kitchens, and I am looking for some ideas for cleaning it, as it looks all dull. I tried some commercial cleaners to clean the stainless steel, but it left scratches on the sink. Later, some friend advised to use vinegar, for cleaning, but all went futile! I want to know about some tips cleaning stainless steel kitchen with some cleaners, which are not too abrasive to use. Can somebody please advice aptly? Thanks.