But I have no idea how to take the door off its slider to check though?
Here are some pictures of the door, any suggestions or advice (or the make/model of the door) would be much appreciated
This is the end that is dipping and gouging into the rail

This seems like it would be an axel or height adjustment but the slot is wider that a screwdriver face (and narrower than a 10c coin) the plastic is pretty degraded as well
