Problem with my Keycool 87

So I've had this board for about 6 months. Just this weekend, my "C" key is acting all fucky. I click it anywhere from 1-3 times, nothing happens. Then on the 2-4th click, it will send the "c" and any "c" that didn't get sent from all the key-presses that did nothing, resulting in the 2-4 "c"'s when all I wanted is one. Anyone got an idea?