4 Signs It's Time to Replace Your Robot Vacuum's Main Brush

Visible bristle damage Replace the brush when bristles are missing, bent, or frayed. This is the most reliable indicator, not a calendar date.

Cracked or gouged rubber Rubber fins that are split, gouged, or hardened won’t clean effectively. Check monthly during filter cleaning.

Tight or noisy bearings If the brush spins with resistance or makes grinding sounds, the bearings are worn. Swap it immediately.

Poor pickup on edges When the vacuum leaves debris along walls or struggles on carpets, the brush is likely degraded. Heavy pet homes may need replacement every six months; light use can stretch to a year.