When to replace robot vacuum brushes, filters and mops

Start with the app's consumables counter

Most current robot apps, including those from Roborock, Dreame, Ecovacs, Eufy, iRobot and Shark, include a maintenance or consumables screen. It counts down the remaining life of each part, usually in hours of use or as a percentage, and sends a reminder when a part is due. When you fit a new part, you reset its counter.

These counters are based on running time, not on the actual state of the part, so treat them as a prompt to look rather than an order to buy. A home with long-haired pets and thick rugs may need parts sooner; a small flat with hard floors may get longer from them. The manual for your model gives the maker's own intervals.

Replacement schedule by part

The ranges below are typical of what makers commonly suggest across popular robots. They are a starting point, not a rule. Always check your own robot's app and manual, which take priority over this table.

Dock bag sizes and fit →

Brushes: side brush and main brush

The side brush is the small spinning brush at the front edge that sweeps dirt from skirting boards and corners into the robot's path. It takes a beating from table legs and walls, so it usually needs replacing more often than the main brush. On most robots it clips on or is held by a single small screw, which makes it an easy swap.

The main brush sits under the robot and lifts dirt into the bin. Some makers use bristles and rubber fins, others rubber-only rollers that tangle less with hair. Shark's self-cleaning brushrolls and similar anti-tangle designs reduce wrapping, but hair can still collect at the ends. If you search for an Eufy RoboVac brush replacement or a Shark side brush, match the part number from your manual, because brushes differ across ranges.

With pets, check the main brush ends every week. Hair wound round the axle makes the brush motor work harder and can wear the bearings. Our guide to the best robot vacuum for pet hair covers which brush designs tangle least.

Filters and mop parts

Most robots use a pleated filter in the bin. Tap it against the inside of a bin to remove dust every week or two. Many filters must not be washed, while some are washable, so check the manual before rinsing one. A wet filter refitted too soon can damage the robot and grow mould; washable filters need to dry fully, often for a day.

Mop parts vary widely. Simple robots use a disposable or washable pad on a plate. Robots with rotating mops or roller mops, often on all-in-one docks, wash and dry the mops automatically, but the pads still wear and are sold as spares. Replace them when they are matted, frayed or stay smelly after washing. Use only the cleaning solution your maker allows; see our article on robot mop cleaning solution.

All-in-one docks add their own maintenance: the dirty-water tank, the mop washing tray and sometimes a dock filter all need regular cleaning.

Compare robot vacuum and mops →

Buying the right spares

Spares are model specific. A Dreame part for one dock may not fit another Dreame robot, and the same goes for Roborock, Ecovacs and Eufy ranges. Before you buy, find your exact model name on the label under the robot or in the app's device settings.

Genuine parts are made to the maker's tolerances. Third-party accessory kits are cheaper and can bundle brushes, filters and pads together, and many fit well. The usual weak points are brushes with softer bristles, filters with looser seals and mop pads that do not grip the plate. If a compatible part does not fit snugly, return it rather than forcing it.

• Check the model name on the robot's label or in the app.
• Match the part to that exact model, not just the brand.
• Prefer kits that list your model in the title and description.
• Keep one spare side brush and filter in the drawer so you are not caught out.
• Reset the app's counter after fitting each new part.

Frequently asked questions

How often should I replace a robot vacuum filter? Makers commonly suggest every few months, often somewhere in the 2 to 6 month range, with tapping out between changes. Your app's counter and manual give the interval for your model.

Can I wash a robot vacuum filter? Only if the manual says it is washable. Many pleated filters should be tapped clean, not washed. If yours is washable, let it dry completely before refitting.

Do I have to use genuine brushes and filters? No, but genuine parts are guaranteed to fit. Compatible parts are fine if they match your exact model and fit snugly; replace them if they wear quickly or leak dust.

What happens if I never replace the side brush? A worn side brush flicks dirt away rather than into the robot's path, so edges and corners are left dusty. It is one of the cheapest and easiest parts to change.