What's with the mirror button on the smart sink?

The root cause of being on all the time is electricity leakage, so the lighting can't be turned off.

The solution is to measure whether the voltage of the product you installed exceeds or falls below the voltage range. If the voltage is found to be higher or lower than the touch switch, please replace the product with a wider voltage.

General 140-260 is better. The reason is that China's power grid voltage is unstable. If the voltage is within the working range, the problem can generally be solved by switching the neutral wire of the current touch switch. If the zero fire line is reversed, it still won't solve the problem. Failure or damage of switching element. Please replace the switching element.

I suggest you ask a professional to replace the components, so as not to get an electric shock.