So that clean that I thought worked... the squeal is back after some hard braking. I guess I'll try some new pads now and if that doesn't work, time to burn everything.
Sand the rotors a bit and clean with isopropyl before and after sanding, or you'll just transfer shit from rotors to pads to rotors. I find it easiest to do with the wheel on the bike and spin it with sandpaper on the rotor and try not to cut your fingers off.
So that clean that I thought worked... the squeal is back after some hard braking. I guess I'll try some new pads now and if that doesn't work, time to burn everything.