8. Steam Cleaning
Nationwide Consumer Testing found that the steam cleaning method, which is misnamed because they don’t even use steam, does only surface cleaning. The hot water detergent solution that shot into the carpet nap forced the loose dirt deep into the carpet causing mud & only removed (15.6 %) of the initial soil.
The high amount of detergent residue remaining in the carpet caused it to re-soil in only 2 to 3 months.
Drying time was between 1 to 4 days with the average being 2 & ½ days.
This method is very unsanitary, as the same water tends to be used all day.