I actually had a customer that had done this when I was wrenching. Shaved head, tats, someone you’d see and assume they’re a guy, and surely would not have done what I’m about to relate. Anyway, he rolls the bike in, mountain bike with v brakes. Says he’s tried everything and can’t get them to stop squealing. I take a closer look and the rims are coated in black sludge. I wipe some off with a finger and it’s gooey. I ask what is this? Customer “ I greased them”! I’m sure I did not poker face it enough. He was not happy with me explaining to him that grease is a lubricant and that I’d have to charge him a bit to degrease everything. He left pissed off. His man card should have been revoked that day.
