I took my car to a local garage as the brakes were making a grinding noise, they had a look and said the pads and discs look fine but they could do with a service, they would strip them down and clean everything.
My wife took the car to kwik fit for "free" brake test. She told the guy there about the other garage saying about servicing them and the kwik fit guy said he'd never heard of cleaning brakes.
Has anyone ever heard of servicing/cleaning brakes
Not surprising that Kwik-fit hadn't heard of cleaning brakes...they don't have much idea, in general.
My latest (2nd year) service included "brake strip and clean" and a brake-cleaning product was used. A bit like this....