Renting and Setting Up Your Machine
Home Depot rents carpet cleaning machines by the day at their tool rental desk — usually around $25 to $40 depending on your location and machine size. You pick up the machine, fill the clean water tank with hot water and the carpet cleaner solution (which you buy separately or rent from Home Depot), and wheel it home. The machine itself is a upright unit with a trigger handle and a wide cleaning head that sits flat on the carpet.
Before you start cleaning, vacuum the carpet thoroughly to remove loose dirt and debris. This step matters because the machine works better on carpet that is not clogged with dry soil. Set up the machine on a hard floor near an electrical outlet and a water source — you will need to refill the clean water tank multiple times during use, so proximity to a sink or outdoor faucet saves trips.
Read the rental agreement tag attached to the machine. It lists the specific model, water capacity, and any quirks particular to that unit. Some machines have a separate button for the solution trigger; others combine them. Knowing which applies to yours prevents confusion mid-job.
Key Takeaways
- Fill the clean water tank with hot water and carpet cleaner solution before you start, and refill it as the level drops during use.
- Vacuum the carpet first to remove loose dirt, then trigger the solution and water onto the carpet while pulling the machine toward you in overlapping passes.
- Let the carpet dry for at least four to six hours before walking on it heavily, and open windows or run fans to speed drying.
- Empty the dirty water tank outside or into a utility sink when ready after use, and rinse both tanks before returning the machine.
- The machine works best on synthetic carpets and performs poorly on delicate natural fibers like wool or sisal without a test patch first.
Filling the Solution Tank and Mixing Correctly
The clean water tank holds both hot water and carpet cleaner concentrate. Do not fill it with solution already mixed — the machine mixes it as it dispenses. Fill the tank about three-quarters full with hot water (as hot as your tap allows), then add the carpet cleaner concentrate according to the bottle instructions. Most concentrates call for one part solution to four or five parts water, but read your specific product because ratios vary.
Stir the mixture gently or let it sit for a moment so the solution dissolves evenly. If you use too much concentrate, the carpet will be sticky and attract dirt faster. If you use too little, the machine will not clean effectively. The rental desk staff can show you the correct ratio for the solution they sell, so ask if you are unsure.
Cleaning the Carpet in Overlapping Passes
Start in the corner farthest from the door so you do not trap yourself in a wet area. Squeeze the trigger handle to release both hot water and solution onto the carpet as you push the machine forward slowly — about one step per second. The machine sprays the solution ahead of the cleaning head.
Pull the machine back toward you without squeezing the trigger. This backward pass is the suction stroke that pulls the dirty water out of the carpet and into the tank below. You will see the dirty water tank fill with brown or gray liquid — this is normal. Repeat: spray going forward, suction coming back, in overlapping rows so you do not miss strips of carpet.
Work in sections of about 50 to 100 square feet at a time. If a stain is stubborn, make two or three passes over it rather than one hard pass. The machine works through repetition, not force. Move steadily across the room, overlapping each row by about six inches so the edges blend.
Emptying and Refilling During the Job
The dirty water tank fills quickly — usually after 15 to 20 minutes of cleaning a medium-sized room. When the tank is three-quarters full, stop and empty it. Carry the tank outside or to a utility sink and pour the water down the drain. Rinse the tank with clean water and reattach it to the machine.
Check the clean water tank at the same time. If the level is low, refill it with hot water and more solution mixed to the same ratio as before. Some machines have a low-water indicator light that tells you when to refill. Do not let the clean tank run completely empty mid-pass — the machine will spray only air and stop cleaning.
Drying Time and Preventing Mold
Carpet stays wet for four to six hours after cleaning, depending on humidity, air flow, and carpet thickness. Open windows and doors to let air circulate. Run ceiling fans or portable fans pointed at the wet carpet to speed evaporation. Do not close doors to the cleaned rooms — trapped moisture can cause mold or mildew smell.
Keep people and pets off the carpet while it is wet. Wet carpet is slippery and foot traffic can resoil the fibers before they dry. If you must walk through, wear clean socks or shoes and step carefully. The longer the carpet stays dry before heavy use, the better the cleaning holds.
Returning the Machine and Cleaning It First
Before you return the machine to Home Depot, empty both tanks completely. Rinse the dirty water tank with clean water several times to remove residue. Rinse the clean water tank as well. Wipe down the outside of the machine with a damp cloth to remove any carpet cleaner spray or dirt.
Check the rental agreement for any damage charges. Small wear is normal, but if you have cracked the housing, bent the handle, or damaged the hose, Home Depot will charge you. Return the machine within the rental period — late fees explore after that. The rental desk will inspect it and process your return.
Carpet Types and When Not to Use the Machine
Home Depot carpet cleaners work well on synthetic carpets like polyester, polypropylene, and nylon, which are common in most homes. They are less suitable for natural fibers like wool, silk, or sisal. These delicate materials can shrink, lose color, or become matted if exposed to the heat and agitation of a rental machine.
If your carpet is wool or another natural fiber, test the machine on a hidden corner first — under a couch or in a closet. Clean a small area, let it dry, and inspect it for damage or color change. If the test patch looks good, you can proceed. If the carpet looks darker, feels stiff, or shows color bleeding, stop and consider a professional cleaner instead.
Avoid using the machine on antique or heirloom rugs. These are better left to specialists. Also skip it on carpet that is already worn thin or has loose seams — the machine's agitation can worsen the damage.
Frequently Asked Questions
What if the machine stops spraying water?
Check the clean water tank level first — it may be empty. Refill it with hot water and solution. If the tank is full, the spray nozzle may be clogged. Look at the spray head under the machine and clear any debris or carpet fibers blocking the opening. Run water through it by hand if needed.
Can I use any carpet cleaner solution, or does it have to be Home Depot brand?
You can use any carpet cleaner solution sold for hot water extraction machines, not just Home Depot brand. Check the bottle to confirm it is designed for rental machines and follow the mixing ratio on the label. Some solutions are concentrate; others are ready-to-use. Do not mix brands or types in the same tank.
Why does my carpet smell musty after cleaning?
The carpet did not dry fast enough, and mold or mildew began to grow. Increase air flow by opening more windows, running fans, or using a dehumidifier. If the smell persists after three days of drying, the carpet may need professional treatment. In the future, clean on a dry day and allow at least six to eight hours of drying time before closing windows.
How often should I rent a carpet cleaner?
Most households benefit from a deep clean once or twice a year, depending on foot traffic and pets. Light vacuuming between deep cleans keeps carpet in better condition and extends the time between rentals. Spot-clean stains as they appear rather than waiting for a full cleaning.
Is the machine heavy to push?
Yes — most Home Depot rental machines weigh 40 to 60 pounds when full of water. They are designed to roll on wheels, but pushing them requires steady effort, especially on thick carpet or up stairs. If you have mobility issues or a large area to clean, ask the rental desk about smaller machines or consider hiring a professional service instead.