Gnat (fruit fly) Catcher: Fill your jar with abuot 1 inch of vinegar. Wrap the top of the jar with a piece of seran wrap. It'll probably just stick, but you can secure it with a rubberband if that makes you feel better. Poke holes in the seran wrap top.
kills the weeds/stray grass One gallon of APPLE CIDER VINEGAR, c table salt, 1 tsp Dawn. Mix and pour into a smaller spray bottle. (you can purchase 3 gallon size Apple Cider Vinegar in the canning section of a good hardware store - cheap!