Any tips on cleaning the things? I've got an old Marantz 2220B and I'm pretty sure all it needs is a new fuse for the lights and a good cleaning, but I can't even figure out what to clean after I get in the thing. And RS didn't have the spray on cleaner the last time I checked, just a stupid pen that's only good for cleaning Atari cartridges.

I am the Doctor, and THIS... is my SPOON!