Pet hair wreaks the same havoc on robot vacuums as hair in a shower drain

Pet hair tangling in robot vacuums works exactly like hair clogging a shower drain. Long strands from dogs or cats wrap around the spinning brush — over and over until the brush slows down, the motor strains, and eventually the whole thing seizes up. It’s the single biggest maintenance headache for pet owners who buy a budget vacuum without an anti-tangle brush design.