Use entire box
Use entire container. You can use any brand of oxy cleaner.
Optional frangrance enhancer. May be omitted, or only 1 container, or use the lavender scent. I re-use these containers with finished product as the lid has measuring marks. I use 2-3 containers.
Grate the bars of soap
Dump everything in tub. Mix.
Re-use containers. Lids have marks for measuring. 1 tablespoon per load. May be used in HE washers.
This is my 2nd batch in 2 years! It lasts forever! I occasionally supplement with additional borax or baking soda depending on clothes being laundered (clothes worn for sweaty activities).