The other week disc brake pads were replaced on a 2004 Corolla. Since then there is a kind of mild grinding sound when they are applied and loud screech noise (like a ships fog horn, but a higher pitch) after a bit of 'stop and start' traffic.
We were told to apply the brakes gently for the first fifty miles after fitting, which we did. We have now been told that the pads have 'glazed' and need sanding down.
Is this something that could of 'just happened sometimes' fairly naturally, or will the garage think it is likely to be our fault; because we did not treat them gently enough for the first fifty miles? Thanks.