[Superman]

It's messy but it's pretty easy. I STRONGLY suggest you get an old Bentley manual of nearly any kind where the car has CV joints. Or find Warren's post of the scanned pages from his. I have an older Rabbit Bentley. The pages I am talking about are the best description, complete with excellent photos, of how to disassemble a CV joint and reassemble. It's a snap, and if you have these images with you, it'll be very easy for you. Cleaning them without disassembling is difficult. Disassembling is easy, but there's a trick to it.

Also, you can reverse them. Keep track of where they were on the car and when you reinstall, put the passenger-side ones on the driver's side and vice versa. This will cause the joints to handle pressure on new race surfaces. You will probably find some wear on them, and maybe they need replacing, but reversing them can also help.