How do you guys handle cleaning/detailing wheel wells. My boss got a new place in secluded northern MN, meaning he has to travel roughly 15 miles on dirt/ gravel/ clay roads to access his new place. I tried every degreaser and wheel cleaner I had and nothing could remove the caked on dirt. He has been running it through the local car wash with underbody spray once a week for the last 2 months and the wheel wells are finally about 80% clean. If I can remove the remaining dirt should I be using something to prevent the dirt/clay from sticking in the future? Maybe a tire dressing?