Most wetting agents require you to heavily water any lawn you apply them to, to wash them into the soil and prevent adverse effects to the turf blades. Is this necessary with Wex? I looked for a label on it, but couldn't find one to read. I love the price on it. I've got to tell you. I'm also wondering how often Wex has to be applied to be of benefit throughout the Summer? Would 1 application in June last throughout the Summer by chance?