1, we can pour a pot of boiling water directly into the sewer first, so that the eggs hanging in the sewer that haven't hatched will be destroyed. 1 degree hot water will basically kill all eggs.
We always have baking soda at home. We can put some baking soda in boiling water and pour it into the sewer. Because baking soda is an alkaline substance, the dirty things in sewers are generally acidic. Baking soda can neutralize the dirty substances in sewers and clean up small flying insects more thoroughly.
3. Pour 84 disinfectant into boiling water. We all know that 84 disinfectant is a special decontamination tool, and the decontamination effect is very, very good, so we pour some 84 disinfectant into boiling water and then into the sewer. It can completely kill eggs. It should be noted that after using 84 disinfectant, you must open the door for ventilation. After all, it is still a little toxic.