Appliances or sink? I have no idea on appliances, never owned SS.
Flylady has a tutorial on shining your sink. It involves steel wool. I clean ours weekly with Comet and elbow grease (not what I would normally use but about 15,000 bottles of it came with the house, so I'm using them up). It works pretty well, but getting all the residue off can be a pain. I still use steel wool when I get something really stubborn on it (thank you, DH, for the tree sap you left in my sink this weekend).
ETA: Just re-read fly lady. No steel wool there, that must have been my own improv