Hello there, I recieved a Gerber Paul 2PW knife from my uncle a few years back. Lately I have had a lot of trouble opening my knife. Tonight i added some oil to the locking mechanism, but it still seems to catch when i completely open or close it. I am wondering if there are any things I can do to help mitigate these problems myself, as I do not want to send my knife out to some stranger to fix. Any suggestions?