I bought one of the higher-end Kryptonite locks, and not doing my homework right this time, I looked at the reviews for it after getting it. There were reports of people have issue opening it after using it for a month of two. I'm now starting to experience this, where I need to slam it to open once the key is turned 180 degrees. I've noticed that the parts that slide in have started to rust. Would you recommend lubing these parts with something like WD40 or is there some other way to remedy this type of situation with a lock jamming? Thanks in advance.