you can wash your shoes in the washing machine without damaging them by following this method

Now let's see what to avoid to always have perfect shoes:

If you see that the shoes start to blacken, first step by washing them by hand and trying to remove all the dirt without having to use the washing machine.
If machine washing is absolutely necessary, do not exaggerate with the frequency of times you do it, otherwise the shoes could be damaged.
Never wash silk, leather or suede shoes in the washing machine or too often by hand as they may get worse over time.
Pre-treat stubborn spots and remove them quickly.