No it's not about that!!
Before and after winter I usually use some silicone spray on the window,door and locker seals to stop them hardening and cracking.
As the spray is a bit hit and miss I purchased a Rubber Care Stick from my local VW dealer.
I imagine something similar is sold by other dealers although I couldn't see any in Halfords.
This should make applying a bit of lubricant to the seals a bit easier,especially if it is windy.
Of course you can also use it on the car.