Re: What is this dirt and why does it keep reapearing
There are certain engines in soap powder that are there to breakdown the dirt in clothes. These engines are known to react with the rubber on door seals that results in the black marks on this seal. Also, at the end of a wash cycle, a small amount of water is purposely left in the sump, this is to prevent smells from the outlet drain getting into the washing machine via the drain hose.
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