The truth is that every time you take a shower, especially hot, due to water vapor, the bathroom mirror blurs. And when it dries it leaves behind marks as if you have not cleaned it.
To avoid cleaning it from the beginning, there is an incredible trick that will loosen your hands. All you need is half a potato.
Specifically, as soon as you clean the bathroom mirror, you pass it with the half potato that you have cut, with gentle movements. You will find that the next time you take a hot shower, the mirror will not fade.