Rusty, I usually agree with you, but not this time. Conceptually, yes, a surfactant is necessary. Many folks would just grab the dish soap. Some of those soaps have not so good stuff in them. Process I agree with.

There is actually made a surfactant that you should be able to get at a farm supply store, it is used to help spread foliars on leaves. It has no bad chemicals that could damage our plants unlike SOME dish soaps.

So folks, don't just grab the dish soap, check what is in it, phosphates are bad news. A few drops of commercial surfactant and you will be all set.