I thought while I was down at ECP that I would pick up a cabin filter 'just in case' as I have only had my 159 for a few months and am going through the standard service items making sure it has all been done properly. I wasn't very happy with the ventilation as it didn't seem to be very eficient and took an age to de-mist. Now I know why - took out the old filter and it was really manky and obviously hasn't ever been replaced. Simple enough job and now my fan blows much more strongly.
So if you have problems de-misting or just an asthmatic fan, try replacing the pollen filter!
So if you have problems de-misting or just an asthmatic fan, try replacing the pollen filter!