I used to see those hair cutters that worked off the air of a vacuum cleaner to pull the hair up and trim against cutters.
I haven't seen one in a long time, but did a Google Search, and there are lots of different kinds available. Some are quite costly, and I haven't a clue as to how well they work.
Do any of my Forum Sisters have any knowledge of them? Could use some Sister Wisdom here!
Thanks and happy RVing!