My kids gifted me an L40 ultra for my bday. I’m blown away by its abilities and in general by how far the robot vacuums have come.
However, I’m disappointed as  it is not picking up all the hair in my bathroom and small threads from the carpet in my hobby room. Even after multiple passes.
Will the optional roller make a difference in picking up hairs and small pcs of threads?
Is there another model that is better at picking up hairs? Any feedback appreciated. Thanks