Since mice in the attic and live traps without effect, a small minefield (6 pieces) of these traps set up. Resounding success: in the first night 4 Hausmäuse exitus. After two and now seems to be calm. I can only recommend. Important: so stand in a corner, that the event is accessible only from one side. Emergency put boxes around corners. No other bait needed but remove Deckelchen bait plate. Had forgotten at the beginning, but still worked splendidly.