As above, it can be done by removing the arch liner and having skinny arms.
One of mine stopped working not long ago and I fixed it when I removed the bumper for a separate issue (dropped a sidelight bulb into the headlight if you must know). Removing the bumper isn't hard at all.
To remove the bumper you need to remove 2 black plastic screws at the top, 2 torx screws on the arches and 4 x 10mm bolts (behind the arch liner and under the slam panel), then unclip and pull forward.