I bought a used Peavey TNT 130. After messing with it for a while I found one of the pots crackled when I turned it. I took the electronics out of the cab and removed two damaged pots. Everything had funk all over it. Cobwebs, some sticky kind of stuff. Is there some way to clean this sticky residue from the circuit board and chassy. (spelling) While I had it torn down that far, I removed the speaker cover. It looks like a beer or pop fell and fizzed all over the speaker, it's speckled with the stuff on about half of it. In places there is a mold growning. Does anyone know anything about cleaning speakers? The amp sound great even though it funky. Any help will be appriciated.