It washes away all the environmental fall-out (dirt, bugs, floating, spores, etc). This way your not smoking it.
Helps with PM in flower and bud rot (at the 1st sign). Can soil drench and foliar, starting in veg, 1x a week theu flower if/as needed.
@Chefdave
Do you remember the "whitening powder" they used to mix into the iceberg lettuce for salads back in the day? What was that stuff? It was like an anti-wilting food safe powder. We used to make a 55gal brute can filled with salad mix and water.