Never gave it much thought, put it in the sink and start spraying both sides right away. If we gang screens, say 4 manual sized, then we soak both sides of all four and keep going until washed out. The question is kind of a "chicken or the egg" thing. There are always more screens burning while we wash out, and into our screen dryer, though we have talked about a dip tank, it doesn't add anything to our process, just changes it, so we decided against it.
Steve