Dish soap

A solution of liquid dishsoap—1 teaspoon to 1 gallon of water—can be used. Frequent applications are usually required. Because dishsoaps can vary greatly from brand to another, it is a good idea to test-spray a few plants before spraying your entire planting.

For example, I found that a paint brush can be cleaned in a spoonful of thinner, just enough to wet it, then washing it in dishsoap. I found that dishes require less soap if you use much less water so I bought a plastic bowl to wash up in, like when camping - 1 quart of dishsoap now lasts me a year!

I take the last paper towel and dot some dishsoap, give it to Charlie and take his pants with two fingers.[…]Then I drop the pants in the sink, squeeze the last of the dishsoap on and start scrubbing the wet spot with my fingers.