Fly Catcher Indoor, Fly Trap, (4 Device + 6 Refills) Fruit Fly Traps for Indoors

VEYOFLY Gnat Trap refill boards should be replaced based on catch level: light infestations every 4–6 weeks, moderate every 2–3 weeks, and heavy weekly or when full. Adhesive typically lasts 2–4 weeks; replace when covered or less sticky.