Tequila Trap

Now that I have an infestation of flying gnats in my greenhouse, I wanted to find an all natural solution to attract them. I set a few traps of the first solution, Apple Cider vinegar + soap and water, which worked best. Then for the hard partying flies, I set grape juice and tequila. Some large ones fell for it. This is after the 1st 24 hours of setting the traps.