Honestly, I've bought a few of those cheap chargers over the years and never had a problem. My sister still uses one from a truck stop that's been fine for her phone for months. Maybe it was just a bad unit or something else was wrong with the phone port already?

Oh man, that's the worst feeling. Been there with plane blades, just grinding away at the wrong angle for ages. A cheap angle guide from the hardware store saved my sanity, just a little plastic block that sits on the stone. Makes it totally brainless.

That shelf liner trick is a good one... I had the same problem last week. Ended up using an old rubber feed mat cut into squares, just stuck one under each foot. It grips like crazy on the damp floor.

Saw my buddy burn some kale chips that way once.

My brain's temper is worse than that glass.