Currently have a set of the dual design Dunlop straploks on my Warwick Thumb. They've been on there for about 6 months. The last couple of times I've played the lock on the horn has started coming loose on its on. I know I've got it connected correctly and that they are installed correctly. I have seen people mention on here that they maintenance their straploks. I thought about oiling them because maybe the ball bearings are getting hung up and not coming out all they way to catch in the groove in the strap button. Is this is a good idea, if so what do I use and will it fix my problem? Thanks in advance for all your input