So I just got a bottle of WGs tire and wheel cleaner HOPING it would take off the crud i have stuck to my rims with no problem.. I followed the directions and sprayed the gel formula onto my rims while they were wet, let it sit for about 30-45 seconds and then went ahead and used a medium-hard bristle rim brush to try and remove the stuck on dirt thays on my rims from 2-3 of neglect and not washing properly. Well needless to say the WG tire and wheel cleaner didn't even put a dent in the dirt.. I mean it litterally didn't even touch it. I scrubbed the puss out of the soiled spots to and nothing. The thing is I KNOW I can get the stuff off by using a really hard bristled brush and ALOT of elbow grease with some Amazing Roll Off BUUUT I'm doing some experimenting here and I'm trying to find a product that is going to help me get the stuff off. Next up on my list of products to try is Mother's Tire and Wheel Cleaner foam spray. I'm gonna try that tomorrow so we will see.. Attached is a pic of my rims and in the corners you can easily see the stuck on crud I'm talking about. Can anyone recommend any products for this? And just to make it clear this is NOT rust. Its just dirt from years of not keeping the rims cleaned.