Loud squeak from braking?

[wmzda5]

Lemme guess... it didn't work. Brake clean is a solvent for disolving grime and brake dust. That's not what's causing the problem.

The chamfer is the best solution that I know of. Sometimes, the disk brake quiet will help, and having proper lubrication and help too, but in general, it's the chamfer that makes the biggest difference.

On my car, I only get the noise in reverse in the morning - or if it's been raining and the car has been sitting for a few hours. One I pull forward and apply the brakes for a normal stop, if I were to reverse the car and apply the brakes, the sound would be gone.

Same here when the car was new. I lubricated the caliper pins and no more noise. What is happening is that the pads are not aligning properly with the rotors as when it is rotating forward causing the pads to vibrate thus the noise. With the pins properly lubed the alignment is a lot better minimizing the vibration.