Just realized my board cleaning method was leaving residue
A client in Austin brought back a repaired amplifier last week, saying it crackled again after a month. They specifically said, 'It looks clean, but it feels sticky under the board.' I was still using 91% isopropyl and cheap wipes. I switched to 99% and lint-free swabs, and the issue vanished. What's your go-to method for a guaranteed no-residue clean on older audio gear?