One key broken, no spill, not software issue

So the "r" key on my keyboard stopped working today. Nothing significant happened (no spills, nothing fell on it, I wasn't typing angrily), it just stopped working. I popped the key off to check it out, the little rubber piece is still in there and looks fine and the two little plastic scissor pieces are too. I pulled up the keyboard viewer to see what I could figure out and the key doesn't light it up at all. Nothing seems to be set incorrectly, it just seems that the contact on this one key might be bad.

Is there a way to get the rubber nipple piece off to check or clean the contact? Is there anything I can do in order to not have to just replace the whole keyboard?

Any help would be much appreciated.