I did wonder when they said the pollen filter had been cleaned but because the car has only been on the road since April I let it go as they also said it was dry so it is not trapping water. I used to be a car valeter and always keep the glass clean. Non smokers and the vents always open so car doesn't get stale. I clean my class perfectly and free; I use warm water and a clean chamois to clean the glass then screwed up dry newspaper to remove the dampness the chamois leaves. This removes all tar, grease and general dirt and works outside too, no wiper smearing! Think we have a problem with the rear screen, when it is switched on now it causes radio interference, I sense earth or suppression problems and the rear window demister is very weak, still all under warranty, just time consuming.