Purchased a used ruger lc9 for the wife today. After getting it home and playing a bit I found out the magazine follower is getting stuck midway through the magazine. The spring is in good shape and not weak. The mag tube is clean and I oiled it up a bit. There are no visible dents on the magazine. Would it be worth while for me to sand the follower a little to free it up? Or am I better off replacing it and cutting my losses?