Cleaning an LK201 Keyboard

I just cleaned an LK201 keyboard. It was actually quite clean with only a few stains and a bit of dust. I used a baby wipe since it seemed to be the most useful in terms of being able to eliminate the dust as well as the very minor stains. Has anyone any other method or suggestions? One problem is that there is one sticky key - PF4 in this case. It is not a problem if I use a quick sharp hit of 4 to 5 times the normal force. When just a gentle to firm force is used, it often sticks and sometimes even goes into multiple repeats. Hitting it firmly again frees up the key and it releases. The problem might have been caused during the cleaning if some of the baby wipe is stuck within the key release mechanism - I tend to remember that the PF4 key was not sticking when I tested it before cleaning. Any suggestions? Jerome Fine