How do I prevent my robot vacuum brush roll from tangling with hair?

Cut the hair off the brush roll once a week—it takes thirty seconds. Some models with “tangle-free” brush rolls (like the [Roborock Q](https://www.amazon.com/s?k=Roborock+Q&tag=wehavethat-20) series or [Roomba j](https://www.amazon.com/s?k=Roomba+j&tag=wehavethat-20)7+) tangle less, but no design is magic. Use a seam ripper or grooming rake, run the vacuum daily, and accept that regular maintenance is the only real solution.