The car wash I have used the most in Fairbanks, is on University Ave. it is before you get to the college, must be just past Giest Rd, not far from where the Alaska Railroad crosses University. It is real close, same side of the road, northbound on University Ave, as Sam's Sourdough Dinner, a most excellent place for breakfast.
This particular carwash has in the past heated their spray water which takes the dirt and grime off much better than using cold water. It has been about 4 years since I washed my rig there last.