Well as I was servicing my X this weekend (air,oil,fuel & cabin filters + oil) I decided to have a look at the state of the new vortex breather I fitted the last time I serviced the car to see if it had accumulated any crud during the last 8-10k miles and the answer was no, not really.. It had a very thin film of oil on it but that was about all. I sprayed some carb cleaner through it seeing as I had it off the car but it looks like a fairly maintenance free part to my untrained eye...
Just thought I'd share

Cheers,
~S.