2010 Nav Head unit door sticking

Today my HU door started acting like it was meeting forward resistance and would start to open and then close again. I had to push the Eject All button a bunch of times until I could catch the edges as they stuck out and "help" it slide down. It didn't take much effort, took less than a second, and no unusual noises, but once past some magical point, it laid down as usual and ejected the discs without issue. So it's just the door. Is there some part I need to lubricate. Has anyone seen this before?

Thanks!