In a pinch I use a teaspoon in my automatic dishwasher with white vinegar in the rinse cup.
I have also used a teaspoon in my HE front loader for laundry with white vinegar as a rinse.
This also makes a good shampoo when diluted and apple cider vinegar as a final hair rinse.
I like the tea tree oil Castile soap the best for cleaning hard surfaces in the house as well!
Thanks, Kim! – Vermont Soap