May be a silly question this one.

Since having new discs and pads on my GSI I've been getting a nasty whining and squeeking sound from my right front when the brakes build up a bit of heat.

I suspected that the brake was sticking so took it into the dealer who tells me that sure enough the caliper is sticking and I need a new one at £155!

What I find amazing is that it didn't do it until they replaced the discs and pads.

What I was wondering is whether there is anything simple that they're 'overlooking' in order to get more cash out of me?

Do the calipers have to be lubed or anything like that?