I have a Whirlpool front loader and loaded the product directly into the detergent dispenser, being sure to make the adjustment within the dispenser tray to accommodate powdered detergents and it worked like a champ.
I have always been meticulous in maintaining the washer. I always dry off the door and both sides of the seal. I leave the washer door ajar when not using the machine. I completely remove the detergent dispenser drawer and rinse out the residual fabric softener, letting it air dry before replacing it. I towel off the inside of the dispenser drawer space and let it air dry to prevent mildew from growing, especially from the water holes over the detergent dispenser. I ran a monthly cleaning cycle with bleach, as directed in the hand book, but I would have a mild odor in the machine until I tried this product. I was skeptical, but am now a believer.
I love the scent of this product and hope it lasts a long time. P & G should make it a Febreeze scent.