Update: a guy in line at a hardware store in Boise gave me one sentence that fixed my faucet
Was standing at the returns desk 3 weeks ago with a $60 cartridge kit I had bought for the third time. The guy behind me watched me pull out my phone to look up the model number and just said, you're tightening the packing nut too hard, that's why it keeps leaking. I went home, backed it off a quarter turn, and the drip that had been running for 6 weeks stopped that same afternoon. He saved me from buying a fourth kit and honestly from calling a plumber. What small tip did a total stranger give you that actually worked?
Had the same thing happen with my garbage disposal. Kept shoving the allen wrench in and cranking it until a neighbor told me to just run water and flip the switch after one good turn. Worked in ten seconds. The forcing thing is real, my dad always said if you have to muscle it you're probably doing it wrong.
A plumber at a supply house told me to stop using teflon tape on the shower arm and just tighten it by hand, and sure enough the leak stopped after I quit cranking on it. Feels like half of home repair is just learning when to stop forcing stuff.