Cheap product, 4 star reviews are deceiving. Only about 2 weeks before that, the rollers lost ALL the threads. I don't have pets, I pick them up before looking in the room. So I really just lightly vacuum the house. I started noticing crumbs where there was no vacuum. I check my Roomba and notice that the rollers are flat and unthreaded. Less than a month later I am back using the original 1 year old Roomba rollers which I am trying to replace and they are in better condition. If I-clean products don't take light cleaning, why the good 4-star ratings? I feel like I'm throwing my money away with this product.