Short answer
To deep clean a carpet, move the furniture, vacuum slowly and thoroughly in two directions, pre-treat stains and high-traffic areas, then clean with a carpet cleaning machine using the right amount of solution. Go over the carpet with extra dry passes to pull out as much water as possible, rinse out detergent where the machine allows, and ventilate the room until the carpet is completely dry before putting furniture back.
Everyday cleaning versus a deep clean
Regular vacuuming lifts the loose dirt from the top of the pile. Over time, though, fine grit and oily soiling work down towards the base of the fibres, where a vacuum cannot reach them. That is what makes walkways look grey and flat. A deep clean uses water and a cleaning solution to loosen that bonded soiling and extract it, along with the residue, from deeper in the carpet.
Before you begin, check what the carpet is made of and look for the manufacturer's care guidance. Wool, viscose, sisal and other natural fibres need more care than most synthetic carpets, and some should not be wet cleaned at home at all.
Preparing the room
Clear the floor completely if you can. Furniture that cannot be moved can be left in place and cleaned around, but put plastic tabs or kitchen foil under the legs afterwards so damp carpet is not stained by wood or metal. Pick up small items, toys and anything that could get sucked into the machine.
Choose a day when you can open windows or keep the room warm, because drying is a big part of the result.
Step by step
- Vacuum slowly and thoroughly, going over the carpet in one direction and then at right angles to it. Use a crevice tool along skirting boards and edges, where fluff and grit build up.
- Treat individual stains first, using the method in our guide to getting stains out of carpet.
- Pre-treat the walkways, such as doorways and the route through the room, with a carpet pre-spray suitable for your carpet, following its label. Test on a hidden area first.
- Fill the machine's tank with clean water and the recommended amount of carpet solution. More detergent is not better; excess is hard to rinse out and leaves the carpet sticky.
- Start in the corner furthest from the door, so you do not walk over clean carpet. Work in slow, overlapping strips.
- Make one wet pass, then two or three dry passes with the spray off, so the machine extracts as much water as possible.
- Empty the dirty water tank whenever it is full, and refill with clean solution.
- If the machine allows, finish with a pass of clean water only, to rinse out detergent residue, followed by dry passes.
- Ventilate the room, keep foot traffic off the damp carpet and brush the pile in one direction so it dries evenly.
- Put furniture back only once the carpet is completely dry.
Mistakes that spoil a deep clean
Over-wetting is the most common problem. Too much water soaks into the backing and underlay, which slows drying, can cause shrinking or rippling, and can leave a musty smell. It can also draw up old stains from below, which appear as brown marks once the carpet dries. Keep passes slow and make plenty of dry passes.
Leaving detergent behind is the second. Soap residue attracts dirt, so a carpet that was cleaned with too much product can look dirty again quickly. Using the right amount and rinsing helps.
Using the wrong product or too much heat on wool and natural fibres can cause shrinking, colour loss or fibre damage. Always follow the care guidance for the carpet and the instructions for the machine.
Stairs, rugs and awkward areas
Stairs need a handheld tool and take care, because they get heavy wear on the front edge of each tread. Work from the top step down, and keep the machine on a flat surface, not balanced on the stairs. Rugs often have different fibres, backings and dyes from fitted carpet; our guide to cleaning a rug explains what to check first.
When to call a professional
A professional clean is worth considering if the carpet is wool or a delicate fibre, if walkways stay grey after a home clean, if there are stains that keep reappearing, or if you are preparing for a tenancy handover or moving house and want a thorough result. Professional equipment can extract more water than most home machines, which helps the carpet dry.
We clean household carpets across south Essex, room by room, including hallways, stairs and landings. Tell us which rooms you want done and any marks that concern you, so the job can be discussed specifically.
Rather have it done for you?
Deep carpet and rug cleaning for homes, end of tenancy and move-ins. Family-run by Jason and Lucas Prior, covering south Essex.
Frequently asked questions
Can I deep clean a carpet without a machine?
You can freshen a carpet by vacuuming thoroughly and treating marks by hand, but a machine that sprays and extracts is what reaches the deeper soiling. Hand scrubbing large areas tends to over-wet the carpet.
Why does my carpet look dirty again soon after cleaning?
Usually because detergent was left in the pile. It attracts dirt. Use less solution, rinse with clean water if your machine allows, and make extra dry passes.
Should I vacuum before deep cleaning?
Yes, thoroughly and in two directions. Loose dirt left in the pile turns to mud when it gets wet and makes the clean less effective.
Related guides
- How to get stains out of carpet: the blot, treat and rinse method that works on most carpet stains, with specific advice for vomit, red wine and pet urine.
- Carpet steam cleaning vs shampooing: what people mean by steam cleaning, how it differs from shampooing and low-moisture cleaning, and which suits which carpet.
- How long does carpet take to dry after cleaning?: why drying time varies from home to home, what speeds it up, and how to look after a damp carpet until it is fully dry.
- How often should carpets be cleaned?: why the right interval depends on footfall, pets, children and your carpet's care guidance, and the signs that a carpet is due a clean.
- What affects the cost of carpet cleaning: the factors that change a carpet cleaning quote for homes and businesses, what a good quote includes and how to compare quotes.