I bought a Bissell carpet machine many years ago. Basically a wet vac with a vacuum head that sprays soap solution or water in front of the pickup. You hook up to your faucet and set an open bottle of mixed soap solution next to it with a pickup tube in the solution. Venturi effect pulls a fixed amount of soap up and sprays it with the water on the carpet when you pull the trigger. I like to use soap then rinse with just water. Works pretty good but don't let the carpet get too bad between cleanings. We like it and use it (but not often enough). Also came with a small head for doing upholstery and such. Nice thing is all you are moving around is the vacuum head and pipe, just like a regular canister vacuum. Only weighs a couple of pounds.