Raid Eucalyptus Mosquito Protection Refill – 45 Nights. Raid Electric Liquid Mosquito Repellent, with a pleasant eucalyptus scent, delivers 45 nights of eight hours per night of continuous protection against mosquitoes, even if a window is slightly open and the lights are on. The refill cap includes a child-safety feature. To remove the cap, press and twist it together. Then insert the refill into the unit until it sits securely. If needed, adjust the device’s pins to keep the bottle upright. Plug the unit into mains power to start. To stop using the product, unplug it. Replace the refill when the bottle is empty. Use one unit per 30 m³ of space. For best results, program the device to start 30 minutes before the room is used.