Ok my wife thinks I'm nuts.
I decided that my FP imac's all white Keyboard was too dirty to continue using.
I had tried alcohol swabs, vacuum cleaners, compressed air, damp cloths etc...
The result was still a grungy keyboard. My solution... I pried every key of off the thing and removed the screws. Every key and every other non electronic piece took a warm soapy bath
I had taken a picture with my digital camera beforehand so I could easily figure out where each key went back.
It now looks shiny white again
So am I nuts?
Steve
p.s. I am typing this from the same keyboard