I sometimes have the same issue with my pre-amp, can I use a contact cleaner or should I buy deoxit? If so I never heard of it, where can I buy some? Also should the unit be taken apart or can I spray it through the space between the volume knob and face plate? (If it is even a spray). Thank you.
If you need some right away, your friendly local Radio Shack will have it. A small can is good for two or three receivers, depending on how many pots and contacts you need to clean.
You can get it cheaper online, assuming the added shipping isn't excessive.