Just put the two blue units into the washer machine before washing. They will magnetically stick right to the metal drum inside your machine, and you can leave them there and never think about them again. When you come to do your laundry, simply put your dirty laundry in, press start, and That’s it! Come back to your clean clothes 20 minutes later. It’s that simple. No more lugging heavy detergent containers from the store and fumbling with toxic gunk at every wash!