2019 Forester Sport CVT
While cleaning the Forester up after playing on some forest roads that had light mud in places I found that the bottom part of the exterior door trim holds a metric you-know-what ton of mud, pebbles, and pine needles. I just gently pulled the bottom of the trim out and sprayed away for quite a while to get it all out. It was packed in pretty good and I used my fingers to work it loose. I was surprised/impressed with how much it held. If I even need to hide some mud from the police, I know where I am going to hide it! I think the piece can just snap off, but I did not try it. If you live in a road salt area, I would pay extra attention to that location when washing.