Oxiclean Washing Machine Cleaner With Odor Blasters Helps Remove Odor-Causing Residues In Any Washer. Cleanser Is Septic-Safe, Phosphate-Free And Safe For Use In Both High-Efficiency (He) And Standard Washing Machines. To Use, Simply Remove All Clothing, Pour One Pouch Into The Washing Drum (No Laundry Detergent), Initiate A 'Clean Washer' Cycle (Or A Normal Cycle With Hot Water) And Wipe Remaining Residue With A Towel. Use One Pouch A Week For Three Weeks, Then Continue Using One Pouch Per Month For Maintenance.