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Catnip is very potent mosquito and pest repelling herb, The Nepetalactone in Catnip has also been proven by The American Chemical Society to be ten times more effective than the commercial chemical, DEET, in repelling mosquitoes.
Put cinnamon in sandbox. No bugs or ants! I would love to know if this really works! Apparently it repels cats too?
3 Ways to Make Homemade Cat Repellent - wikiHow Finally some ideas that sound like they may work. I'll over look the fact that one says to use a heaping cup of water. REALLY? How do you heap extra water in there?