One: Why do squat toilets have a foul odor?
The unpleasant odor after using a squat toilet may be due to the absence of a check valve in the toilet drain. A squat toilet with a check valve can effectively seal odors within the drain, preventing them from spreading throughout the bathroom.
If the toilet in your home has a backwater bend, but still has an odor, it could be because the toilet is clogged. In this case, the backwater bend will not be effective in preventing odors.

Two. What should I do if the toilet smells?
1、The unpleasant odor in the toilet bowl is caused by the absence of a check valve. The fundamental solution is to perform a secondary renovation, installing the necessary check valve, to achieve a permanent solution.
2. Toilets must be thoroughly cleaned. Flush and scrub the toilet weekly, then pour an appropriate amount of toilet cleaner into the toilet bowl, close the lid, and let it sit for a while before flushing. This will help maintain a clear and unobstructed toilet bowl.
Place one opened box of cooling oil.
3. Can also be used to deodorize by pouring cola into the toilet.
4. Sometimes, even after thorough cleaning, restrooms can still emit unpleasant odors. Placing a small cup of vinegar in the restroom will eliminate the odor, and it will last for approximately six to seven days, allowing for replacement once a week.
5. Odor elimination: Open a container of odor-eliminating agent and place it in a low corner of the bathroom. The unpleasant odor will be eliminated, and a single container can be used for 2-3 months, making it economical and practical.
6. Use air freshener to eliminate odors: Apply a few drops of air freshener to the light fixtures in the bathroom. The heat generated by the light fixtures will help to volatilize the air freshener, thus eliminating the odor.
7. Dry the remaining tea leaves and burn them in the toilet or drainage area to eliminate bad odors.