I had to ask the doctor what sorcery he used to create this olfactory oasis. “It’s the Pet Odor Exterminator Candle,” he said, gesturing to an unassuming glass-jar candle on a shelf.

“Citronella candles have been a staple in deterring mosquitoes,” says pest control professional Kris Bagnara. “It masks your carbon dioxide emissions, confusing their tracking systems.” ...