I have a Reese receiver lock like this.... http://www.homedepot.com/p/Reese-Towpower-5-8-in-Stainless-Steel-Pro-Receiver-Lock-7030200/202255022 We used a receiver hitch reducer last fall for our bike rack. I left the reducer on all winter. It didn't look too bad. I used a few squirts of WD-40 just to make sure. It unlocked without a problem. The center popped out. I thought "great!". But then when I went to pull the lock end off, it wouldn't come off. I've continued to wiggle, jiggle the center part... but it won't release. Any idea on how I can get it to release?