After replacing my window motor several months back, The new one started to play up. It was stuck down for a week until I could get to fix it over Christmas.
After removing it I found it full of water (half a cup full). I stuck it in a warm oven for half an hour and then sprayed with a water dispersant until it turned over ok. It has now been taped with a water proof tape over the plastic connector housing.
I'm guessing that the majority of window problems encountered by us are mainly on the Drivers side because the connector end faces upwards. The drivers side I think faces downwards, and so shouldn't full up with water.
Hope this helps someone in the future.