OT: cleaning pots on my vintage audio amp

Hello People, I just set up a new shelf unit from InterMetro for my TV and my audio/video system in my living room. My Amp is an old Onkyo from the early 70's. I need to clean the switches and pots. I get reduced sound output occasionally and I can usually fix it by wiggling a few of the switches, so I'm thinking a good cleaning is in order. I tried once before, but used an electrical cleaner, probably not meant for fine electronic use. Also, I didn't remove the faceplate, so I didn't have very good access. What can I buy, hopefully at Radio Shack, that I can clean the switches with? Also, is there some sort of lubricant I should spray into the switches afterwards? I like my audio/video system as it's a mix of new amd old, but I need it to sound good besides look cool! Chad Fernandez Michigan, USA