I recently pulled every single key off my apple pro keyboard (bluetooth). Took about an hour to do but was very effective. Start on the right side of the keyboard (near the arrow keys). The keys pop off quite easily. Just wedge your finger under the key and gently apply upward pressure to pop it off. Be especially careful with the big keys like return, shift, etc. They have a hinge mechanism that is somewhat more fragile.
Also when you're taking off the keys, make sure you order them on your desk/table, this makes it much easier to put it all back together again in the end.
Good luck!