
Zaphod B
Raccoons-Be-Gone, Inc.
This is true, and crap gets inside the gear even in the absence of cigarette smoke.Smoke gets into the gear and gunks up the switches and pots. Don't think that because the gear has a metal case that the smoke isn't getting inside--it is.
Part of normal preventive maintenance for a band that gigs a lot is (or should be) to periodically break the gear open and clean all the switches and pots with contact cleaner.