Instead of buying foaming soap refills, try this: Buy one container of foaming hand soap. When it's empty, refill with 2 Tbsp. liquid hand soap for every 1 cup water. So simple, so easy, and cheaper. I haven't tried this yet, but I'm thinking the same recipe should work for foaming dish soap. I'll try it when my refill soap runs out.
When my foaming hand soap dispenser is gone I just use our dish soap to make more. The ratio is 3 parts water & 1 part soap. It works just like foaming hand soap.
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I would love a healthy way to make my own foaming hand wash. My daughter is OCD and washes her hands constantly.