at 20k miles, you NEED to pull them.
if you remove the bolt in the bottom of the forks, then remove the cap, the entire cart kit will come out in one piece. take cleaner and spray down the internal portion of the tubes as well as clean the valving,etc. on the cart kit. let the cleaner evaporate and reassemble.
Being right is bitter-sweet when you're ruled and surrounded by morons.
"Men fight for liberty and win it with hard knocks. Their children, brought up easy, let it slip away again, poor fools. And their grandchildren are once more slaves." - D.H. Lawrence