The old guy in Tulsa who taught me to wiggle every connector before I sign off
I was about to close out a fridge call in Tulsa when the homeowner, a retired tech named Ray, asked if I'd wiggled every connector yet. I laughed it off, but he made me do it, and sure enough one harness plug was loose, causing the intermittent fault I'd been chasing for 2 hours. Now I do it every single call, so what's the one weird habit an old timer drilled into you that you still use on every job?