I have two Roamio remotes that have started to display symptoms of bad contacts on some switches. (Activation requires heavy or repeated presses on some buttons; other buttons are fine.) The batteries are fresh. My backup remote functions normally, so the problem is not with the Roamio units.

I know that typical rubber-membrane switches can degrade in various modes, including contact wear and grease/oil/crud buildup. I'd like to take the remote apart to clean the contacts, but I see no way to do so. There don't appear to be any accessible screws, and I was unable to pry the housing apart along the (very narrow) seam.

I tried squirting contact cleaner generously around the inside of the remote; no improvement.

Can anyone tell me how to get the remote apart without damage? Thanks!