That old timer who called me out for using canned air on shutters
A retired repair guy watched me blast a shutter with canned air and just shook his head. He said 'you're just pushing grit deeper into the pivots, use a blower bulb instead.' I brushed him off at first, but after three repairs came back with sticky blades, I caved. Switched to a rubber blower bulb for all shutter work about 6 months ago, and my return rate dropped from like 1 in 8 to maybe 1 in 40. Canned air still gets used for sensors and mirrors, but not on mechanical parts anymore. Has anyone else had to unlearn a bad habit from a stubborn lecture?