Brake Caliper Noise????

[crios]

Hi all,
My right rear brake caliper is apparently very dirty and is doing something that cause a clunk…cluck….cluck noise which increases with speed. When I engage the clutch or cruise without accelerating, the noise stops.

This first started happening about a year ago. I took it to the dealer ($400 later) and they said the caliper was really dirty, they cleaned it and three months later it was doing the same thing. Since then it has happened on and off, usually goes away on its own, but for the last week it has stayed. I even took the tire off and caliper off and cleaned the outside of it the best I could. The noise went away for a day, but now it’s back.

Has anyone else experienced this? I’m thinking of rebuilding the caliper and cleaning the inside of it. Is this hard to do? What will I need to replace once I take everything apart? What should I use to clean the caliper?

Thanks,
Cesar