lowendrider

A couple of years ago I went for a drive in the rain with the wipers on. When I got back home, I shut the Jeep off with the wipers still on. Overnight we had a little snow which froze them to the windshield. When I went out that morning I started it up and left it for about 10 mins to warm up not realizing the wipers were on. Well...long story short since that day, when I turn the wipers on it they work fine but sound like a tumbler full of marbles. Very annoying to say the least. Maybe the motor heated up and burnt off some grease?? Anyone ever had one apart and if so, is this something I might be able to remedy?