I've just come back from Palau, where I was using my Nikon 1 AW 1 to do some underwater photography. In packing up my gear for the flight home, I detached the lens (the 11-27.5mm UW copy) from the camera body, put the body cap on the camera and the rear lens cap on the lens, then placed each of them in my carry-on camera bag. All standard procedure, nothing strange or different than usual. Now that I've returned home, I'm trying to clean up the camera and inspect it for damage before I store it away until my next trip. However, I've run into a bizarre problem: I cannot get the rear lens cap off the lens. It's totally stuck, and has resisted all my attempts to untwist it from the lens. In the two years I've owned the camera, I've never encountered a problem like this before. Nothing I've tried has gotten the lens cap to budge. So, before I apply brute force to remove the lens cap by using a wrench, which could end up destroying the lens, can anyone suggest an alternative way for me to loosen the cap? The only thing I can figure is that, somehow, there's a tight vacuum in the cavity under the plastic lens cap that's holding it tightly in place. Some silicone grease may have rubbed off the O-ring on the lens mount and coated the inside of the base of the lens, thus forming a tight seal with the lens cap.