It's been decorated for a year. It's tasteless when it's hot, but it stinks when it's cold. What happened?

The smell of formaldehyde or paint will quickly combine with air when it is hot in summer, and the gas will disappear after volatilization. After cooling, the air circulation is relatively small, and you will feel the smell is relatively heavy. If you insist on ventilation and open the window for a period of time, the situation will improve after half a year. In addition, you can put some valuable things or charcoal in the corner of your home to reduce the odor.