We have had our NV for a month or so now and being black we have it washed 2-3 times a week. Every time it gets washed the rear doors leak and there is water running down the inside of the doors to the floor. Is this a common problem that anyone has heard of and do I need to have the dealer look at it? The only problem is all the dealers that are authorized for the NV in my area are not near us. Any thoughts would be appreciated.