Originally Posted by Tomham

Hi there I’ve got a squeaking front disc brake and feel like I’ve tried everything. It squeaks when I brake and particularly in cold conditions. It also has some minor vibration.
so far I’ve tried cleaning the brakes and pads with iso alcohol, specialised disc brake cleaners, replacing the pads, replacing the disc and even replacing the caliper+pads.
I recently realised when I run a rag with iso alcohol over the brake ( around it). It creates the same squeaking noise. As if it’s a resonating frequency of some kind. Has anyone ever seen this before? And any suggested fixes. I have videos but can’t seem to upload here.