1/3 bar of soap (I used a bar that was 250 grams or 8.8 oz)
6 cups water
1/2 cup washing soda
1/2 cup borax
4 cups hot water
Grate your soap (about 80 grams or 3 oz)
Add 6 cups water to a pot with grated soap and heat until blended. Remove from heat.
Add 1/2 cup EACH borax and washing soda stirring until dissolved.
In a large bucket (7.5 L / 2 Gallon) pour 4 cups hot water + your soap mixture. Stir well. Add cold water until bucket is full