Can someone tell me how to use the mosquito-repellent incense of chrysanthemum?

The commonly used liquid is Lan Ju mosquito-repellent incense, which is relatively more convenient to use electricity. Think about it, it's quite cost-effective. I use 40 yuan /5 bottles of anti-mosquito liquid, which can last for five months. The average consumption per night is only over 20 cents, which is cheaper than a candy ball, but it can bring me a good night's sleep. It's too valuable.