The rental machines by the grocery store door look like a bargain, and for a fresh spill or a quick touch-up they can be. For a whole room or a whole house, here’s what you’re really comparing.
Heat
Most rental machines don’t heat the water. They use whatever comes out of your tap, and it cools in the tank while you work. Heat is what loosens the body oils and greasy soil that make traffic lanes look gray. A truck-mounted system heats its own water out in the van and keeps it hot all the way to the carpet.
Suction
This is the big one. A rental machine’s vacuum runs off a household outlet. A truck-mount’s is powered by the van’s engine, so it pulls far more water, and the dirt in it, back out of the carpet. That’s what you see in the photo above: hair and lint pulled out of one customer’s carpet. Less water left behind also means faster drying. With Mark’s system, most carpets are dry in 4 to 6 hours.
Soap
Rental machines come with a jug of detergent, and the label usually calls for more than your carpet needs. Whatever isn’t rinsed out stays in the fibers, and soapy residue is sticky, so it grabs the next dirt that walks by. That’s why some carpets look dirtier a few weeks after a do-it-yourself cleaning than they did before.
Drying
Carpet that stays damp for a day or more can start to smell musty, and in Florida humidity the pad underneath can grow mildew.
If you do rent
- Vacuum first, slowly, in two directions.
- Use less detergent than the label says.
- Rinse with a last pass of plain hot water.
- Make extra dry passes with the spray off, until the machine pulls up very little water.
- Run fans and the A/C, and keep pets and people off the carpet until it’s dry.
When to call a pro
Call for a whole room or house, pet accidents, or carpet that’s still under warranty. Carpet warranties ask for professional cleaning, so a rental cleaning won’t count (see how often to have carpet cleaned). Mark’s truck stays outside, and only the hose comes in.
