There is oil in the toilet tank. What happened?

If there is oil in the toilet tank, it is usually caused by the following reasons:

1. The wrong cleaner was used: some cleaners may be mixed with old oil stains and then pushed into the toilet tank. These cleaners usually contain grease, which may enter the toilet tank if used improperly.

2. Observe and improve the pipeline: pipeline problems may also lead to oil in the toilet tank. If your pipes are aged or blocked, this may cause oil to seep into the water tank.

3. Oil stains touch the old parts: After the toilet has been used for many years, it may be found that the old parts are worn and lead to oil stains. Red rubber pads and plastic parts are easily damaged, and may also be used to contact old oil stains; These parts may cause oil stains in the toilet tank.

You can try several ways to solve this problem. First, check whether there is any problem with the pipeline for maintenance and cleaning. Secondly, check whether the cleaning agent used in the toilet is correct to prevent them from entering the water tank together with the old oil. Finally, if the old parts are found to be worn, replacing them with new parts may solve the problem. If you still can't solve the problem, please consider asking a plumbing engineer or a professional to check and repair the water tank.