A:AnswerFrom what I can tell without actually having the keyboard in front of me, it does not appear the keys are removable. This is a liquidproof keyboard, which implies there may be a layer of material sealing the keys. It does show for cleaning to just wipe the keys with a cleaning cloth.
A:AnswerMight be the wrong driver for the keyboard. I would re-install the driver for it and see what happens. There's also always the chance that it might be broken.