Acura MDX 2004

Everytime I go through the carwash I get sprayed a bit from my moonroof (yes, it is closed). The Acura dealer and the "case-manager" from Acura USA both say that this is normal and that I need another type of carwash. I also own a BMW X-5 that this doesn't happen to and know of others with moonroofs on MDX's and other makes who say this doesn't happen. Has anyone else had this happen or is Acura just being difficult? Also any advice on how to stop this.