Is my keyboard broken?

So its only my D key on an asus g50vt-x5 gaming laptop.I really don't eat at my laptop too much, and if I did, I've already taken all the keys off and used a vacuum cleaner with a keyboard attachment on it, as well as a can of compressed air. Its only the one key and and it usually get stuck, but it occasionally just has a long bouceback time (it takes longer to spring back up). Any ideas on what i should do next would be greatly appreciated, I cant play bad company 2 with it like this!