Wie beleibt die Innensohle eines Schuhs immer sauber, sodass nagelneue weiße Socken nicht die Farbe jener verschmutzen Innensohle abbekommen?

You can’t keep the shoe interior clean.

Apart from the dirt that enters the shoe, by whirling (air) or by foot/sock itself (mechanically), the shoe interior is a breeding ground for bacteria due to the poor air conditioning.

Also, shoes cannot be replaced and cleaned as socks.

Due to the construction of shoes, there are socks that protect our feet.

An object of use which takes over a protective function is correspondingly worn and in this case also dirty, especially in the case of unfavorable colors such as white.

With correct cleaning, you can keep white socks for a long time, otherwise it’s just logical that the color loses.