The Hoover SteamVac Dual V and Rug Doctor Mighty Pro 3X are highly rated carpet shampooers, according to Good Housekeeping. The Bissel ProHeat 2X is also an effective carpet cleaning machine.
The Hoover SteamVac Dual V is powerful and easy to operate. It features spill suction, automatic shutoff and a two-chambered reservoir tank. One part of the tank holds clean water, and the other holds undiluted cleaning solution. As it runs, the machine combines these fluids in the correct ratio.
The Rug Doctor Mighty Pro 3X is a commercial-strength carpet shampooer that features superheated cleaning solution injection and powerful scrubbing bristles that break down tough grime. This machine also has extra-large reservoir and waste tanks.
The Bissel ProHeat 2X handles dirt and stains effectively and features easy-to-use controls. It has a spot-cleaning option and a built-in heater that warms the water for more effective cleaning.