Currently my Spyderco Sage 2 has be getting a grinding feel sometimes when I disengage the lock. This happens to be one of my first knives (including a Spyderco Delica 4 FFG) and I'm quite new to the vocabulary used in describing knives. From what i understand, grinding feel is called a sticky lock? Ive done some research and learned this could be prevented by drawing on the tang of the blade where the lock bar contacts the blade with Sharpie or pencil graphite. Ive tried this many times and it works for maybe 20 cycles (opening and closing the knife). I want to learn a better way to prevent the stickiness so I don't have to constantly keep reapplying graphite or sharpie. Ive also learned that Carbidizing the lock face can completely stop the stickiness and prolong the life of the knife. It is also expensive to get a machine so, I think that might be out of the picture. If anyone has any tips to keep my knife from getting sticky, please post on this thread. Also, if nothing seems to work, what will happen to the lock bar or blade tang if nothing changes? Will it wear down so much where it could eventually add blade play? Anything to keep this knife alive is welcome. Thanks.