Gnat Trap Indoor Stix, 12 Pack Gnat Stix (formerly known as Bug Stix) by Biocare have a vendetta against fungus gnats, and Gnat Stix won't stop until every last fungus gnat in your garden is dead or gone. Fungus gnats are those gross flies that breed in damp soil and feed off of the fungus of your soil and then fly around people's mouths because they are attracted to carbon dioxide. When fungus gnats first become adults, they emerge from the soil and run up the stem of plants, and then use the plant as a launching pad for their first flight. Gnat Stix are traps that resemble plants and attract the fungus gnats to try to run up them. Gnat Stix are the most effective treatment against fungus gnats and are completely non-toxic.