Dirt is trapped in carpets in layers, with fine dust at the very bottom, then pet hair and coarse dust, and finally crumbs and sand near the top. Only the topnotch machines are powerful enough to reach the fine dust, which is trapped in the underfelt.
HOW WE ROLL
Most vacuums have a motorised roller brush, which works with the suction. For best results you should always start with your suction head on a raised setting, then gradually lower it until the roller agitates the carpet, which frees up the deep-seated dirt.
BAG OR BOX?
Experts disagree on bagged versus bagless vacuums. Obviously, a hard dirt box is far more convenient, being easier to empty and adding no extra running costs, but bags use a rubber-sealed system, where no dust at all can escape.
If you have hairy pets you shouldn’t compromise on suction power. Consider investing in a dedicated attachment for brushing up their hair. Animal lovers should check out the top vacuum brands, which now all have special models for deep-cleaning pet hair. Here bagless also works better.
Cordless upright vacuums are great for manoeuvring around without the hassle of plugs and cords, but they lack the suction power needed for a deep clean. These work better on hard floors and are suitable for small apartments, as the batteries barely last an hour.