Slight correction: Water boils at 100 degrees C, it won't get any hotter no matter how long or how many times you boil it - it will just turn to steam. Removing pads from backings - put in a pan of boiling water - put them in the oven and check regularly - put the pad in a vice and wind away - the pad will crush and pop out of the backing. Make sure you dont catch any of the backing.