What if the bait is gone and the red light is flashing?

A) Batteries. Be sure that they are the correct quality and are working (voltage could be down) and inserted correctly. B) Test the unit (see -How to test the trap) C) Clean the metal kill plates (the two at the closed end of the trap) D) You could have a fast Mouse – Put food at rear as normal plus 2 pieces in the middle of the trap Also turn the trap at a 90 degrees to the wall with front facing wall so the mouse must slow down and turn to go inside.