Magnetic Cam Locks???

I use Break-Free CLP. It is a Military spec Gun Cleaning Formula that is a Lubricant, Solvent and Protectant All-in-One. It works great in lubricating locks. I use it on all my outdoor locks, including my vehicles and trailer doors. Just two or three drops is all that is needed for most locks. I've also used it to deice neighbors car door locks as well as my own since it has a low freezing point. I just put a drop on the outside of the lock and let it penetrate. Then I put a couple drops on the key and insert it turning it back and forth a couple. The smaller plastic bottles come with an applicator tube that can be inserted into the tip of the bottle for precision oiling and inserting into a lock.