The ingredients from the dual-chambers combine and instantly begin removing the toughest carpet spots and stains. The key benefit of OxyPRO is its ability to permanently remove spots and stains such as red wine, cola, and fruit juice. It is designed to remove the stain all the way to the carpet backing, which means no more re-appearing stain or re-wicking effect. Let OxyPRO settle into the stain for several minutes before blotting. OxyPRO will continue to fight spots and stains deep-down.