Home made laundry soap, Fels soap grated before putting in the blender.
Weaponized in a blender. 1 bar Fels soap, 1 1/2 cup washing soda. 1 1/2 cup TSP, 1 1/2 cup Borax.
We use in our top loader 1 table spoon per load
Later on I substituted sodium tripolyphosphate for the trisodium phosphate using the same ratios...much better. Also if you nuke the Fels bar in a microwave it becomes much easier to grind up in the blender. The heck with that grater.