Ok. I had a little Deoxit party last night. The results so far:
My Aphex Aural Xciter, a pedal with good sound and notoriously shoddy workmanship, now seems to be working fine. Score one for Deoxit.
I have been having some issues from the FX loop of my SVT 4pro. That is to say- I can't seem to get the darn thing to work properly. There is a LOT of noise and hum whenever I try to connect anything to it and I end up just not using it. A couple of blasts of deoxit did not fix this issue. So that really isn't a negative for deoxit, it just means that a bad connection isn't the problem.
Same thing for my '98 Stingray. This was my main gigging bass for 10 years. It has had a gazillion miles put on it. I take pretty good care of my gear-- i.e. the finish is still imaculate on this bass. But the tuners and frets have tarnished from smoky bars and my sweaty hands. The pole piece show some build up for the same reasons. The saddle height screws were hidden under some gunk. Over the last few years this bass developed some nasty hum from what seems like either a bad battery connection or a bad output jack connection. Sometimes it plays fine. Sometimes I get a bad hum and a tap on the battery compartment or a jiggle of the instrument cable fixes the issue. Fine for home use but not reliable enough for the kind of gigs I was playing.
After a few blasts of deoxit on the battery terminals and in the jack hole (lol)-- nothing good. Only nasty hum and electro-static noise. So, again, not really a negative for Deoxit. It's not a substitute for a real repair. I was just hoping that the problems weren't bad enough to require outside help.
BTW deoxit did work for my scratchy pickup selector on my '93 Gibson explorer -- But I won't get into that. This is talkBASS after all
I still have lots and lots of pots and jacks to give a treatment to. More to come....