Hey David, HP actually published a couple of videos on this topic. I’ve been looking for a replacement part but it doesn’t seem to exist. The rear camera part is easy to find but HP doesn’t even produce a spare part or list a number for the front facing camera.
I have the same problem and it seems to be extremely common for the X2 model. Always described as debris or “artifacts” + fuzzy out of focus. So it’s pretty dumb that HP doesn’t seem to have the spare part, but lots of folks said they sent theirs in under warranty.
initial disassembly of tablet panel https://www.youtube.com/watch?v=-oazDw8RwM0
removal of camera module http://site-853123.bcvp0rtal.com/detail/video/5810689383001/how-to-replace-the-front-facing-webcam-on-the-hp-chromebook-x2---12-f000-cto