I have had my mini since it was first released. Over time, the position where the nozzle wipe occurs has been moving downwards in the y-direction. For a while, this was kind of cool because I could flip the pad around and get a new surface for wiping. However, it is now just barely on the edge of the wipe pad. Anybody have any idea what might be happening and how I might fix it? Otherwise, the printer works perfectly.