I had a set of AMP steps on my Tundra for 6 years. I hunt in the swamp and have to go down muddy, gravely, oilfield roads in south Louisiana. They held up fine. When I would see that they weren't retracting during hunting season due to mud and debris, just go to the carwash, blow off all of the crud, and use a good spray lube, or oil. Not WD-40. I used Ballistol non-aresol spray.
