Q: I have been told that you have a formula of Miller beer, Tide detergent and something else to get rid of crabgrass. What was the last ingredient?

A: This supposed lawn tonic recipe and its variants have been passed around since the Sixties. Beer, detergent, ammonia, aspirin, tobacco, and other household items are prominent in the recipes. No matter what hucksters say, science shows that the recipes do not work. Do not waste your time. I give more thorough details at bit.ly/lawnmyths.