A robot vacuum can keep everyday dust under control, but it cannot retire your ordinary vacuum. Here is how to decide whether your floors justify the expense.
There is an appealing bargain at the heart of a robot vacuum cleaner: you buy the machine, and it does the boring bit while you do literally anything else. Then you find it waiting beside a chair leg, asking for help.
That does not make it useless. The question is whether your home gives it enough clear floor to earn its place — and whether you are happy to keep a second vacuum for everything it cannot reach.
No. Think of it as a maintenance cleaner rather than the machine you bring out when the house needs a proper going-over. Which? has found that robot vacuums can handle everyday dirt well, but recommends a conventional vacuum for deeper cleans and larger messes. Its tests also found that most robots struggled with corners, despite their little spinning side brushes.
That distinction matters if you have carpets. Robot performance varies considerably by model, and Which? found that most did better on hard floors. A robot making regular passes through the kitchen may spare you some weekday cleaning. Asking it to pull embedded dirt from a much-used carpet is a different proposition.
Stairs are straightforward: the robot will not do them. Nor will it clean the sofa, skirting boards or the gap behind the radiator. You will still need a vacuum with a hose or attachments. What you may gain is fewer occasions when you have to haul it out simply because the floor looks dusty again.
A robot vacuum does not eliminate the cleaning job. It takes over the most repetitive part of it.
Nor is this a speed upgrade. In a recent comparison, Which? found every robot it tested took longer to clean an area than a person using a conventional vacuum. That is fine if you can leave it working while you get on with something else. Less fine if guests are arriving in ten minutes and someone has scattered crumbs everywhere.
They work best when the floor is reasonably open and the layout is predictable. Before looking at a specification sheet, look down. Shoes in the hallway, charging cables by the sofa and dining chairs packed tightly around a table all make the robot’s job harder. Some models avoid obstacles better than others; none can put your belongings away first.
Door thresholds, thick rugs and changes between flooring types deserve particular attention. Check a model’s tested performance on the surfaces you actually own, not just its advertised suction figure. If much of your downstairs is hard flooring and you can keep walkways clear, regular scheduled cleaning starts to make sense. If most rooms are carpeted, cluttered or split across floors, the case is weaker.
Mapping can be genuinely useful. It means the robot records the room layout so you can schedule particular areas or mark a no-go zone — perhaps the tangle of leads under your desk. But a good map does not make a machine better at picking up dirt. Prioritise independent cleaning and navigation tests over the number of clever-looking features in the app.
There is also a small domestic negotiation to be had. Someone must clear the floor before a run, rescue the robot when it gets stuck and carry it if it is cleaning another storey. If that someone is invariably you, factor it into the promised labour saving.
Start with the vacuuming. Which? has reported prices ranging from around £300 to more than £1,000, while finding that a higher price does not reliably mean better cleaning. Its tests have also identified models under £300 that clean well. Decide what you can spend, then compare tested performance on your floors, obstacle handling and ease of maintenance.
A self-emptying dock sucks dirt from the robot into a larger container. It is useful if you want fewer trips to the bin, particularly in a busy household, but it does not make the whole arrangement maintenance-free. You still need to deal with collected dirt, brushes and filters. Check the size of the dock and where it will live: Which? found some self-cleaning stations bulky enough to make placement a nuisance.
A mop attachment sounds like two chores removed at once. Temper that expectation. Which? found the robot mops it tested were generally average, and that stubborn marks still called for manual cleaning. Mop pads, water tanks and any dirty-water containers also need attention. If mopping is your main reason for spending more, you may simply be buying a more elaborate job for yourself.
Pet hair is another reason to read results for a specific model rather than trust a badge on the box. Which? found some robots coped well and others clogged or struggled. Replacement bags, filters, brushes and mop pads should be easy to obtain at a price you are willing to keep paying. The purchase price is only the start.
Many robot vacuums rely on a phone app for schedules, maps and no-go zones. Some use cameras or other sensors to navigate. That makes this a connected household device, not merely a vacuum that happens to move. Before buying, check what information its app collects, whether you can turn off features you do not want and how long the maker promises security updates.
UK rules for covered consumer connected products took effect on 29 April 2024. They require manufacturers to publish a minimum security-update period and prohibit easily guessable universal default passwords. They do not guarantee that a product will receive updates for as long as you might like. The National Cyber Security Centre advises keeping smart devices updated and switching off remote access if you do not need it.
The Information Commissioner’s Office also advises consumers to examine smart products’ data-collection and sharing information. A floor map or camera feature need not be a deal-breaker, but you should know what you are inviting indoors. If an app account, privacy settings and another device to update sound like more work than getting the vacuum out, that is a perfectly respectable answer.
Buy a robot vacuum if you have plenty of accessible floor, want help with routine dust and crumbs, and can live with occasional rescues and maintenance. Keep your ordinary vacuum for carpets that need a deep clean, stairs and corners. If your floors are crowded or your budget is tight, a good conventional vacuum is probably the better buy.
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