I leave mine inside the cab because I noticed small rust deposits from the rails on the cleat clamp after leaving them on for a few months during the summer. Water probably doesn't drain and dry as easily inside the metal bed rails.\n\nI found this out BTW after having to remove my cleats because a squirrel was sitting on my bed rails and chewing on the cleats to sharpen its teeth! I have a huge Burr Oak in my backyard with acorns this year and a ton of squirrels. It gnawed my cleats up a little but they are still totally useable - just a little scared. It gnawed my top bed rail in one small spot, but not too bad at all, just a knick really. Most of the damage was gnawing to the cleats. They are battlescared LOL! It also chewed apart a canvas awning at my house. I kept an eye out and busted the squirrel in action on the awning. I had busted it a few time before - in the morning - so I had my pellet rifle ready. Got him. Not a problem since. Squirrel with a chew fetish!