Flies are an ever-present nuisance around many homes in the summer months. Get continuous protection from flies with TERRO Fly Magnet Bait refills. It can be used with all fly trap systems. When used with your compatible trap, the bait attracts a variety of flies that pester you outdoors, including house flies, barn flies, and bottle flies. The bait works by luring flies into the trap. They go in expecting a treat, and find they are unable to leave. For your convenience, the TERRO Fly Magnet Bait is incredibly easy to use. Simply empty the bait pack into a compatible trap, add warm water to the fill line, and swirl to mix. Set the trap at ground level or hang the trap on a tree branch, stake, or other suitable hanger. Hang in warm, bright, calm areas for the best results. TERRO Fly Magnet may take a few hours before it becomes fully active. Once active, the effectiveness will not diminish over time, providing optimum fly control. When the trap is full, it can be emptied and re-baited again and again.