Just washed it a few month back. Plugged all the keys out and just put it in a baldi with soap for a night. Next day dry it up. Just for fun, even sprayed it black since the old color already too washed out. Nowadays every now and then I just blow the dust away or use my multi-function cloth to clean it up. Do it around once every few days, and you will have a clean keyboard as long as you keep doing it.

Well the thing is for my keyboard, it has somehow a different keyboard layout. its somewhat ergonomic kinda type where they keys are pointy towards the middle. Once you're used to it, its really hard to be used to normal ones (Same goes the other way around since my friends does have some trouble using it. ). Plus, I love my keyboard. Won't even change if someone gave me a G15 or Tarantula.