By the RoboVac UK – The UK's Best Robot Vacuum Reviews & Buying Guides Team · Updated May 2026 · Independent, reader-supported

Robot Vacuum Maintenance 101: How to Keep Your Robovac Running Like New

A robot vacuum is one of the more useful bits of kit you can own, but it only stays useful if you look after it. Neglect the brushes for a few months, let the filter clog up, or ignore the sensors getting dusty, and what was once a diligent little cleaner becomes an expensive ornament that pushes fluff around the floor. The good news is that maintenance takes about ten minutes a week if you build it into a routine. Here is exactly what to do, and how often.

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Why Maintenance Matters More Than You Think

Most robovacs are designed around consumable parts — brushes, filters, and side brush arms that wear out and need replacing. Manufacturers build replacement schedules into their apps for a reason: a partially blocked filter can reduce suction by 30–40%, and a matted main brush loses the ability to agitate carpet fibres properly. Skipping maintenance does not just reduce cleaning performance; it puts extra strain on the motor, which shortens the lifespan of the whole unit.

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Cleaning the Main Brush Roll

The main brush (or brush roll) sits underneath the vacuum and is the part that picks up most debris. It is also the part that clogs fastest, particularly in homes with long hair, pet fur, or carpet fibres.

How often: Every one to two weeks, or more frequently if you have pets or long hair in the household.

What to do:

• Remove the brush roll from its housing — most modern robovacs have a quick-release latch, no tools required.
• Use the small cleaning tool that came with your vacuum (usually a combination comb and blade) to cut through any wrapped hair and pull it free from the ends.
• If you have lost the tool, small scissors and a seam ripper work just as well.
• Wipe the brush with a dry cloth, check the end caps for hair wound around the axle, and clear those too.
• Inspect the bristles or rubber fins for signs of wear. Bent, flattened, or cracked bristles are a sign the brush needs replacing.

Some higher-end models — the Roomba Combo J series and many Dreame units, for example — use rubber extraction rollers rather than bristle brushes. These still need clearing of tangled hair but are generally less prone to deep matting.

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Filter Care and Replacement

The filter is your vacuum's lungs. Most UK robovacs now use HEPA-style filters, which are excellent at trapping fine dust and allergens but become restrictive as they load up.

How often: Tap clean every two weeks; replace every two to three months depending on usage.

What to do:

• Remove the dustbin and take out the filter.
• Tap it gently over a bin — outdoors if possible — to knock loose dust free. Do not bang it hard against a solid surface, as this can damage the filter media.
• Never wash foam pre-filters and HEPA filters together if they are separate components. Check your manual: some foam pre-filters are washable, but most fine-particle HEPA filters are not. Washing a non-washable filter collapses the fibres and ruins its filtering ability.
• Hold the filter up to the light. If it still looks heavily grey or you cannot see through it even after tapping, it is time to replace it.

Replacement filters vary significantly in price by brand — genuine Roomba filters tend to cost more than compatible aftermarket options, but quality varies. Look for filters that explicitly state they meet HEPA filtration standards rather than just "HEPA-style."

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Side Brushes

The small spinning side brushes sweep debris from edges and corners into the vacuum's path. They are often overlooked, but hair wraps around their central spindles and the brushes themselves curl and splay with use.

How often: Check monthly; replace every three to six months.

What to do:

• Pop the side brush off its post (usually a simple pull on most brands).
• Clear any wrapped hair from the spindle with a pin or the cleaning tool.
• Lay the brush flat — if the arms are noticeably bent upward or the tips no longer reach the floor when fitted, replace it.

Side brushes are among the cheapest consumables you will buy. A multipack of compatible replacements for popular brands like Eufy, Roborock, or Ecovacs typically costs only a few pounds on Amazon UK.

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Sensor Cleaning

Cliff sensors stop your robot from tumbling down stairs. Obstacle sensors help it navigate. Dirty sensors cause erratic behaviour — the vacuum getting stuck in open spaces, refusing to enter certain rooms, or repeatedly bumping into furniture it should be detecting.

How often: Monthly, or whenever you notice navigation becoming erratic.

What to do:

• Locate the cliff sensors on the underside of the unit (usually small dark windows near the front and sides).
• Wipe each one gently with a dry microfibre cloth or a clean cotton bud.
• Do the same for any front-facing obstacle sensors or camera lenses on the top of the unit.
• Never use spray cleaners directly on sensors.

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Dustbin and Charging Contacts

Empty the dustbin after every run — most apps will remind you. A full bin reduces suction immediately and, on bagless units, can allow fine dust to bypass the filter.

Every couple of weeks, wipe the charging contacts on both the dock and the underside of the robot with a dry cloth. Dirty contacts cause charging failures and the frustrating scenario of returning to find your robot sat idle with a flat battery.

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Seasonal Deep Clean

Every three to six months, go further:

• Remove the brush roll housing cover and clear the cavity beneath it.
• Check the drive wheels for debris jammed around the axles.
• Wipe down the entire underside with a lightly damp cloth.
• Check for firmware updates in your app — manufacturers regularly push navigation and performance improvements.

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Keeping Spare Parts in Stock

The most common reason a robovac sits unused is that a part has worn out and nobody has ordered a replacement yet. It is worth keeping one spare filter and a set of side brushes at home. Most UK retailers and Amazon UK stock compatible parts for all major brands — search your specific model number alongside "spare parts" or "accessory kit" for the best results.

A well-maintained robot vacuum can comfortably last five or more years. The consumables over that period will cost far less than a replacement unit, and the cleaning results will stay consistently good throughout.