Effectively repels mosquitoes for 60 nights Ridsect Liquid is a liquid vaporiser refill to be used with a liquid heater. It repels mosquitoes and protects you effectively all night long for a good sleep until you switch off the heater/diffuser. 1. Open the cover of the liquid refill 2. Place the bottle in the Ridsect Liquid Electric starter. Avoid touching wick 3. Can be used with any Ridsect Liquid Electric starter (30N/60N) 4. Do not overturn or lay the starter on its side 5. Use in ventilated places 6. Use more than one starter if the room will have more than 30m3 7. To stop the starter from working just unplug it