Look for a machine with a quick warm-up time; some produce steam in just 30 seconds, while others take 3 minutes or more. Handheld units provide around 10 minutes of cleaning time before needing a water refill. Larger canister versions can last up to 45 minutes but are harder to maneuver. Some machines require you to hold the stream of steam in place for up to 15 seconds to ensure proper sanitization, which can mean a long cleaning session for, say, a kitchen floor. Others take just 1 to 3 seconds. And there’s also price: Stick-style mops run around $35 to $55, while canister versions cost $100 and up.