Why are the walls of the kitchen sticky on a rainy day?

On rainy days, the humidity in the air is relatively high, and the ventilation is not good, so the volatiles (odor) in the toilet will become more concentrated, so the feeling (smell) will be more obvious (large).

It should be that the sewers are relatively full.

The water pressure is relatively large, and the toilet water pressure is not much greater. >>>More

Because of the low pressure of rainy weather, the air is not circulated.

This is due to the low atmospheric pressure on cloudy or rainy days, and the slow diffusion rate of air on the ground, so that the odor of the toilet is not easy to diffuse. >>>More

Rainy days are more humid, because the human body water evaporates less.