hi mate, i have mine off at the moment so here goes
i have the rear wheel out at the moment so once thats out caliper simply slides off its sliding pins the ones with the little rubber boots on them, pull out the little clip holding the brake pad pin in and then give the pin a little tap through the hole on the right hand side as it has a little expanding clip on the left hand end of it, once thats out both pads will fall out. give everything a good clean and i tend to put a little bit of copper slip where ever the pads touch the caliper.
not sure if you can do this with the wheel still in as i didnt look as my wheel is already out i thought i would clean caliper.