Soap spray for bugs

Found this in the June/July 2013 issue of Organic Gardening, unfortunately in a letter to the editor, so it's not available for pinning.

For a spray that works on all kinds of bugs (ants, potato bugs, white flies, etc.), mix:

• 1 cup water
• 2 tablespoons witch hazel
• 2 drops of dishwashing liquid

Spray on whatever needs it, both in the garden and around the house.