Preheated carpet purifier answer improves stain penetration

https://www.scribd.com/document/1003277912/Steam-Carpet-Cleaning-in-Las-Vegas-The-Gold-Standard-for-Deep-Clean-201563

Preheated carpet cleanser solution improves stain penetration. Warm water is helping ruin surface rigidity, permitting detergents to succeed in and lift embedded soils.