My sister swore by the 'freeze your smart speaker' trick to fix a weird hum

She told me to put my Echo Dot in a ziplock bag and stick it in the freezer for 20 minutes when it started making a constant low buzzing sound. I thought it was the dumbest gadget advice ever, but I was desperate. After the 20 minutes were up, I plugged it back in and the hum was completely gone. It's been quiet for about 4 months now. Has anyone else had to do something this weird to fix a gadget, or was my sister just messing with me?

Got told my wire pulling technique was causing damage, changed it up and now my pulls are way cleaner.

Changed my mind on those cheap glow plug testers after a bad call

I had a no-start on a 6.0 Powerstroke last week, and my old cheap tester showed all four glow plugs on the passenger side were good. Spent two hours chasing wiring before I grabbed a buddy's Snap-on unit, which showed two were actually dead. The cheap one just gave a weak light for a bad circuit. Anyone have a go-to brand for a solid glow plug tester that won't lie to you?

That moment the quarter panel on a '68 Mustang started to buckle on me

I was in my shop in Tacoma last Tuesday, trying to fit a new quarter panel. The metal started to buckle right at the wheel arch, a classic oil-canning issue. I stopped, walked away for ten minutes, then came back and used a shrinking disc on the low heat setting. It took the tension right out and let me finish the weld line clean. Anyone else have a go-to fix for that sudden buckle in old sheet metal?