You did the whole house, and the carpet still looks grey along the skirting boards. That is rarely a frequency problem. Most of us vacuum too fast, in one direction, with the wrong head and a bag choking the airflow. Speed, overlap, head and airflow are the four levers.
Quick Answer: Vacuum slowly from the far corner to the door in overlapping passes, then cross the carpet again at 90 degrees. Brush roll on for cut-pile carpet; off, or the hard-floor head, on hard floors. Protect suction: bag out at two-thirds full, bin at the MAX line, filters monthly.
Why you should trust us
Simply Maid cleans homes in seven Australian cities, and vacuuming is part of every clean. Sources sit beside the claims. Where we are describing our own habit rather than a published instruction, it is marked (practice). The allergy section rests on ASCIA, the National Asthma Council and the Better Health Channel, not on us. We clean homes; we do not give medical advice, and where the evidence is contested we say so.
Step-by-step: how to vacuum a room properly
Clear and dust first. Pick up anything larger than a coin (practice): bulky objects choke the hose (Miele). Then dust shelves, skirting tops, fans and sills.
Fit the right head (see the table), then crevice-tool skirting boards, door frames and stair edges.
Start at the far corner and work toward the door: you never cross finished carpet.
Slow, overlapping passes. Forward, then back over the same strip. The Carpet Institute of Australia says to overlay by about 50 mm — half a head width (practice).
Second pass at 90 degrees on carpet. Pile leans one way; a cross pass opens the tufts and lifts pet hair (practice; pet hair guide).
Finish at the door, emptying the bin if it is near the line.
Which head and setting for each floor
The setting depends on the carpet, not the vacuum. The Carpet Institute's vacuum fact sheet rates motor-driven powerheads above air-driven turboheads, and puts the care guide first: ignoring it can void the warranty.
Floor | Head and setting | Watch out for |
|---|---|---|
Cut-pile carpet | Powerhead, multi-level height adjustment (CIA) | An air-driven turbohead is less effective (CIA) |
Loop-pile, Berber, cut-and-loop | Suction-only, or a powerhead with multi-level brush height adjustment (CIA) | Follow the care guide; wool needs its own care (CIA) |
Timber, laminate, hybrid, vinyl, tile | Hard-floor head, or brush roll off | Grit under a spinning brush scratches the finish; vacuum before mopping (practice) |
Rugs | Suction only, fringes flat | No brush on rubber-backed or loose-weave rugs (practice) |
⚠️ Safety note: If the brush roll cannot be switched off, keep the motorised head off timber and laminate; use the parquet or felt-strip tool. Manuals vary by brand and model, so check yours (timber floor care).
Why your vacuum has lost suction (and the five-point check)
Suction falls when the bag is full, or the exhaust or motor-protection filter is clogged (Miele). Check in this order:
Bag or bin. CHOICE says replace a bag at about two-thirds full; dirt left sitting may encourage mould and germs. Bagless: empty at the MAX line (Dyson), or after each use.
Filters. In practice, hold the pre-motor filter to a window: no light through means clean or replace it.
Hose and wand. Disconnect the hose and shake it: anything loose rattles out. Check each end, then clear the rest with a broom handle (CHOICE).
Brush roll. Hair wound around the roller stops it turning: unplug, cut across it, pull it free (CHOICE).
Seals. In practice, check the bin, filter cover and head click shut: air leaking in before the filter is not pulling at the floor.
How to clean and maintain your vacuum
CHOICE's schedule, with Dyson's specifics for washable parts; your manual overrides it.
When | Task | Why |
|---|---|---|
After every use | Clear the brush roll; empty a bagless bin outdoors or into a liner (practice) | Dust emptied indoors comes back |
Monthly | Wash a washable pre-motor filter, dry it 24 hours; tap out a non-washable one; check the bag | A clogged filter cuts suction (Dyson, Miele) |
Yearly | Deep-clean the bin, cyclone and hose; replace a worn brush roll and filters on the manual's timing | Filters often come with the bag pack (CHOICE) |
⚠️ Safety note: Unplug, or take the battery out, before any cleaning, and pull the plug rather than the cord (Better Health Channel). Never wash the motor housing, never refit a damp filter, never run the machine without one. A frayed cord means the appliance is replaced, not taped (Energy Safe Victoria).
⚠️ Safety note: Cordless models run on lithium-ion batteries. The ACCC says to charge on concrete, ceramic or steel, never a bed, sofa or carpet, and to disconnect when full. Never use a damaged charger. Stop using a battery that is dented, swollen, leaking, hot or venting gas, and drop flat ones at a B-Cycle point, never in a bin.
Vacuuming when someone has dust-mite allergy or asthma
House dust mites like warm, humid, dark rooms, and the Better Health Channel notes the dominant Australian species favours the coast. Reactions are dose-related.
Vacuum carpets and soft furnishings weekly. ASCIA and the National Asthma Council give that frequency; the Better Health Channel adds mattress seams (mattress guide).
Use a HEPA vacuum if you can, with ASCIA's caveat: HEPA vacuums "may remove more allergens than other vacuum cleaners, but all vacuuming increases the amount of dust mite allergen in the air."
Ask someone else to vacuum while you leave the room — the National Asthma Council's wording. ASCIA suggests a mask, or 20 minutes before re-entering.
Expect a reduction, not a cure. ASCIA states carpets hold dust mite that vacuuming cannot completely remove. It lowers the allergen load; it does not disinfect.
Whether this improves asthma is contested. A 2008 Cochrane review found mite-reduction measures could not be recommended for asthma. A 2024 meta-analysis in the World Allergy Organization Journal argues it predates current standards, and finds total bedroom control may help where partial measures do not. Ask your GP or asthma educator.
Common mistakes
The myth to drop first: "a vacuum that has lost suction needs replacing" — run the five-point check before you spend anything. Three more habits that undo it:
Walking pace in one direction, instead of slow overlapping passes in two.
Washing a HEPA filter that is not washable, or refitting one damp (CHOICE, Dyson).
Emptying a bagless bin indoors.
When vacuuming doesn't work
Vacuuming removes most dry soil, often 70–80% by the CIA's estimate, but not the bonded soil that dulls carpet (practice). The CIA recommends a professional clean every 12 to 18 months, or as the manufacturer specifies, per AS/NZS 3733.
CHOICE's buying guide says robot vacuums work best on hard floors and are usually bad at getting dirt out of carpet: treat one as a top-up. If the five checks do not restore suction, suspect a cracked hose, a failed seal or a tired motor (practice).
Moving out, vacuum edges and under furniture as carefully as the middle; our end-of-lease cleaning page covers a bond clean.
Cost and time
Vacuuming properly costs nothing extra in product; the consumables are bags, filters and eventually a brush roll, replaced when the manual says or suction drops (CHOICE). What that comes to depends on the machine. Miele's Australian shop lists its GN HyClean Pure pack — four dustbags, a motor protection filter and an exhaust filter — at $49.00 (as at 7 September 2026). A bagless machine has no bags to buy, but the filter is still washed monthly and replaced on the manual's timing (Dyson, CHOICE).
On time, the published figure is frequency rather than minutes: the Carpet Institute says at least weekly, and twice weekly in high-traffic areas.
Frequently Asked Questions
Q: Should the vacuum brush be on or off for carpet?
On for cut-pile carpet; suction-only, or an adjustable powerhead, for loop-pile, Berber and cut-and-loop. That is the Carpet Institute's split; the floor table above carries the rest. Check your carpet maker's care guide first: the CIA ties the warranty to following it.
Q: Is it OK to vacuum up bicarb soda from carpet?
Use it sparingly, and check your manual first. Miele says fine dust — it names sawdust, sand, plaster dust and flour — blocks the pores of a vacuum bag very quickly. Dyson's Australian manual says the filter unit may need washing more often after fine dust. Bicarb is the same kind of powder. A light sprinkle left to sit, then vacuumed slowly, is the conservative approach (practice). Afterwards, check or change the bag, or empty the bin and tap out the pre-motor filter (CHOICE).
Q: How often should I vacuum if I have pets or allergies?
Weekly at minimum, the frequency ASCIA and the National Asthma Council give for dust-mite allergy. The Carpet Institute adds twice weekly in high-traffic areas, which is where a shedding pet's hair collects: hallways, the sofa run, the path in from the back door.
Q: Can I wash a HEPA filter?
Usually not. CHOICE says most HEPA filters cannot be washed: tap or brush them clean, and replace them on the manual's timing or when suction drops. Dyson designs some to be washed, then dried for 24 hours. A HEPA filter removes, in theory, at least 99.97% of 0.3-micron particles (US EPA); Asthma Australia notes "HEPA-style" filters fall short.
