Hello Carol and thank you for your question.
You should not use a steam mop to clean your TrafficMaster Allure 12 in. x 36 in. Corfu Resilient Vinyl Plank Flooring. Steam, and particularly the heat from the steam mop, will affect the adhesive grip strips.
Your TrafficMaster allure floor has been designed to be very easy to maintain. Dust mop or vacuum your floor at least twice a week. Do not use a household dust cleaner of any kind as this may cause the floor to become slick or damage the finish. Simply sweep the floor as often as needed.
Food spills should be cleaned up as rapidly as possible with a quality liquid vinyl cleaner. Make sure the cleaner you choose is an all-purpose liquid cleaner that is NON-ABRASIVE.
Allure One Step cleaner (in gloss or satin finish) is recommended when you have experienced some loss of the original appearance over time.
Never wax this vinyl floor.
There are additional care and maintenance instructions in the owners manual found here: http://www.homedepot.com/catalog/pd...
Best wishes with your project.