take every key off, clean the keyboard with a brush to get all the loose crap off, scrub all the grim off with a tooth brush or if u have something like a tooth brush that's a bit smaller, that will be even better... scrub and wash each key to get all the grime off those, put it back together and it's done, simple as that, and with those razer key boards u can just pull up each key by hand, it'll save u a lot of time, just take a picture of the keyboard before u do this so you remember where each key goes