Skeeter Screen Patio Egg is an easy, safe and effective way to help deter mosquitoes and other biting insects from your patio and other outdoor living areas. Set it or Hang It Anywhere for Mosquito-Free Outdoor Living. Deet Free Scents of Nature formula is derived from essential oils. Pour the oil into the egg diffuser and the fragrance will migrate up the sides and hatch within 24 hours allowing you to enjoy the outdoors continuously 24 hours a day, 7 days a week.