For gnats, the exterminator investigates overwatered plants and clogged drains

https://www.scribd.com/document/1014817775/Outdoor-Exterminator-Keep-Patios-and-Decks-Pest-Free-155056

For gnats, the exterminator investigates overwatered plants and clogged drains, applying bio-enzymes and adjusting watering habits to eliminate small fly breeding grounds.