Take the top off of an empty spray bottle, place a small funnel into the opening and pour in 1/2-cup of vinegar. Add two tablespoons of baking soda, and wait for the foaming to subside.

How to Make Foaming Hand Soap in 5 Easy Steps When you’re looking for a Dawn Powerwash refill substitute, keep in mind that you cannot just refill the spray bottle with regular Dawn dish soap.