'Why Does My Robot Vacuum Suck Now?' Well, When's The Last Time You Cleaned It?

"Self-cleaning" doesn't mean no maintenance is required ever. And built-up gunk has a huge impact on performance. Robot vacuums are clutch when they're working correctly — and uniquely infuriating when they're not. (A broken dishwasher could hardly incite the rage of stepping on crumbs that a robot vacuum should have easily sucked up.) If your robot vacuum isn't cleaning your floors as well as …