I have had the mud gaurds since delivery, and no, it doesn't keep everything off the bottom trim. They do only extend down a couple of inches after all.I too was having trouble with the black trim, I installed a set of mud guards, my hope is that they prevent the road schmutz from getting on there!!!!
Glad to see another AutoGlym enthusiast on here. Everything they put out is superior to the normal over-the-counter shelf stock. Not cheap. But GREAT!This has been discussed before, but I ended up with the autoglym plastic cleaner and protector. Works great. Great stuff!!!