I can't agree with Phil enough. I've always over looked isopropyl alcohol.
I have noise in some of the gain pots. Took the cap off, and used a eye dropper and let a few drops seep down the shaft. Gave a few twists and let it dry for a few hours.. magic.
Cleaned some board contacts with a soft toothbrush, and bam. Zero issues.
I got a bottle of PUREtronics brand for 8 bucks...