I've had my R5 since it launched, so about 4 years, and I'm noticing more and more of the rubber parts on it swelling. I think this happened to some degree with my previous cameras too. The cover for the mic/headphone ports doesn't quite fit right, the front grip has swollen a little bit and come detached from the body, and now I just noticed the eyecup has popped out of where it's supposed to slot onto the camera because it's swollen too. I don't know for sure what's causing this. My only guess is that I sometimes wear sunblock during the summer when I'm outdoors. That's really the only foreign chemical substance that I can think of that ever gets near the camera. Has anyone else had this happen, and is there any way to stop it, short of not wearing sunblock any more which I'm not willing to do? Thanks.