How to clean carpet: deep cleaning and stain removal

The short answer: how to clean carpet comes down to two jobs: lifting the dirt deep in the fibers and stopping spills before they become permanent stains.

• Vacuum first, thoroughly
• Pretreat stains: blot, don't rub, and work from the outside in
• Deep clean with a carpet cleaner, then let it dry
• Stain-by-stain guide for wine, coffee, pet messes and more
• Next step: Plan it with the Cleaning Schedule ($4.49).

Knowing how to clean carpet comes down to two jobs: lifting the dirt that builds up deep in the fibers, and stopping spills before they become permanent stains. You don't need a professional for most of it. A good vacuum, a carpet cleaner (rented or owned) and a few kitchen-cabinet supplies handle nearly everything. This guide covers deep cleaning step by step, plus Consumer Reports' stain-by-stain methods for wine, coffee, pet messes, mud, grease, paint and blood.

How to clean carpet: the quick version

1. Check the care label and your carpet's warranty.
2. Vacuum thoroughly, slowly and in more than one direction.
3. Pretreat stains with the right solution for each one.
4. Deep clean with a carpet cleaner, following the machine's directions.
5. Let it dry completely before walking on it or moving furniture back.
6. Keep up with regular vacuuming and same-day spot cleaning.

Before you start: check your carpet

Consumer Reports' carpet cleaner guide says to check the warranty for your carpet and the carpet manufacturer's website for cleaning suggestions, so you don't damage the carpet or void its warranty.

CR also says to avoid carpet cleaners on delicate or natural materials, citing the carpet experts at SharkNinja:

• Wool, cotton or silk
• Antique or hand-woven rugs
• Items labeled "S" (solvent-only) or "Dry Clean Only"

These can shrink, bleed dye or discolor from the moisture. For those, spot clean gently or call a professional.

Supplies

Step 1: Vacuum first

Vacuuming is not optional before deep cleaning. CR's carpet cleaner tester Dan Kahl explains that carpet cleaners are nothing like a standard upright vacuum: "the instructions for these machines tell you to vacuum your floor first using a conventional vacuum cleaner, and then use the carpet cleaner to clean up embedded dirt." Go slowly and cross the room in two directions to pull up as much grit as you can.

Step 2: Treat stains before deep cleaning

Spot treat any stains before you run the machine (the guide below covers each type). Two rules from Consumer Reports' stain removal guide apply to every stain:

• Blot, don't rub. Rubbing may prevent a stain from being entirely removed. Blotting with a clean cloth gets better results.
• Work from the outside in, toward the center, so you don't spread the stain.

CR's carpet stain guide adds: test any product on a small spot first to make sure it won't discolor your carpet, and check the carpet maker's recommendations. Use white cotton cloths so no dye transfers.

Step 3: Deep clean with a carpet cleaner

A carpet cleaner sprays water and cleaning solution into the carpet and sucks the dirty water back out. CR says a good one can make short work of muddy paw prints, wine spills and years of accumulated dust and soil in a way even the best vacuums can't.

1. Fill the tanks following the machine's instructions. Most models have one tank for water and solution and another for dirty water. Some three-tank models mix the solution for you.
2. Start in the far corner of the room and work toward the door.
3. Make slow passes, overlapping each one slightly.
4. Use dry-only passes if your machine has them. CR says a dry-only setting sucks up more water and may speed drying.
5. Empty the dirty tank whenever it fills.
6. Use the hose and tools for stairs, corners and upholstery.

Step 4: Let it dry

Open windows or run fans to help the carpet dry. Keep people and pets off it until it's dry to the touch, and wait before moving furniture back so wet carpet doesn't stain from furniture legs.

How to clean carpeted stairs

Stairs collect dirt in the corners and along the front edge of each step, where feet land. Vacuum each step with a crevice tool first, working from the top down. For deep cleaning, a carpet cleaner with a hose and an upholstery or stair tool is far easier than lifting a full machine step by step. "If your stairs have carpeting, you'll want a longer hose to reach up the steps," CR's Kahl says. CR notes that the cords on models in its ratings are typically 20 to 22 feet, with some as long as 29 feet, and that a longer cord and hose save repositioning.

Spot cleaning vs. deep cleaning

Both matter. Quick spot cleaning keeps stains from setting, and regular deep cleaning removes the ground-in soil that vacuuming leaves behind.

Rent or buy a carpet cleaner?

CR says that because rental machines are cumbersome and renting is inconvenient, it may make the most sense to buy one if you expect to use it frequently.

Stain-by-stain guide

These methods come from Consumer Reports' carpet stain guide.

Change cloths often so you don't put the stain back on the carpet. For cooking oil and butter, see how to remove grease stains from carpet, upholstery and clothes.

A simple all-purpose spot cleaner

For everyday spots that don't fit a category, Consumer Reports' stain guide uses a basic cleaning solution of ¼ teaspoon of dishwashing liquid in 1 cup of lukewarm water. Apply it with a white cloth, blot, then blot with plain water to rinse out the soap. Soap left behind can attract new dirt.

Never mix cleaning products

Some stain methods use vinegar and others use ammonia or bleach-based products. Use one product, rinse it out, and only then try another. Never combine cleaners on the same spot.

Keep carpet cleaner for longer

• Vacuum high-traffic areas often, like hallways, entries and the family room.
• Treat spills the same day. CR's advice is to act fast when you spot a stain. For a red wine spill, follow our red wine stain removal steps.
• Use doormats and take shoes off at the door to cut down on tracked-in dirt.
• Keep a stain kit with white cloths, dish soap, clear detergent and vinegar.
• Put deep cleaning on your calendar, so it happens before the carpet looks dull.

How often to clean carpet

Add carpet care to your cleaning schedule

Carpet care is easiest when it's written down. Our Cleaning Schedule ($4.49) is a 9-page printable with daily, weekly and monthly checklists, a seasonal deep clean list, room-by-room checklists, a family chore chart and a cleaning supplies list. Put vacuuming on the weekly list, deep cleaning on the seasonal list and your stain kit on the supplies page.

Have hard floors too? Here is how to clean hardwood floors.

If you'd like to get the whole home organized at once, the Home Management Bundle ($16.99) includes the Cleaning Schedule along with the Household Binder, Home Maintenance Log, Home Inventory, Moving Planner and Password & Accounts Log. Bought separately, those six come to $32.94.

For more, see our deep cleaning checklist and our cleaning schedule template.

Your next step

Put together a small stain kit today: white cloths, dish soap, clear laundry detergent and white vinegar, kept together under the sink. Then choose a weekend for a deep clean, check your carpet's care instructions, vacuum slowly and treat stains before you run the machine.