When I turn on the switch, I see the green light flash one time briefly, but I'm not sure if I hear a sound. Is it working?

The buzz is easy to hear. Mine is now not buzzing so it’s not working. I cleaned it but no go. It worked great ... when it did.

We apologize for any confusion! If the trap is flashing green when turned on, the trap is armed and ready. While the trap will often buzz as well, the buzz is fairly quiet and may be hard to hear if there is any background noise.