Never heard of diluting the SU cleaner either. Why would they package it in a spray bottle that you would have to find another container to store and dilute etc. Doesn't make any sense at all. Dawn dishwasher soap works fine too in the recipe if you already have it in your kitchen. Just remember to use the glycerin. it is a must to keep your stamps conditioned. Glycerin on a damp cloth helps to recondition your windshield wipers too. Oh yes, I was too lazy to go to the kitchen downstairs the last time I ran out of cleaner and I used a few drops of diluted Suave Shampoo - Lavender scented. Nice change of scent at the stamping table and it works just fine. I have well water -- mountain spring water and I admit to being too cheap to buy distilled. As long as you dry your stamps well before putting them away I don't think they will be hurt. However, treated city water -- I don't think I would.