We have a Dish ViP722k DVR-HD receiver. The Dish remote controls that came with it are starting to show signs of buttons that must be pressed more firmly for them to work. I've successfully cleaned other remote controls by removing the plastic cover and using fresh household hydrogen peroxide with a cotton swab to clean the contact surfaces of the printed circuit board and conductive rubber pad. The problem is that I can't find any screws in the 722k remotes, nor can I separate the plastic covers using a sharp blade or any other sharp instrument. It's like they're bonded together such that I'd have to use a dremel tool with a sharp mini-saw to carefully cut them apart. Is there an easier and more practical way to get the plastic covers apart, or must these remote controls be replaced with new Dish remotes or by separately purchased third-party remotes?