Spot-carry carpet cleanser gel clings to vertical fibers on stairs

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

Spot-lift carpet purifier gel clings to vertical fibers on stairs. Provides longer touch for obdurate stains, then rinses clean without sticky leftover film.