Turn on this hidden switch on the washing machine, all the dirty water drains out immediately

Turn on this hidden switch on the washing machine, all the dirty water drains out immediately (Page 3 ) | March 2, 2025

If the machine does not have this mode, choose a regular wash cycle (without putting clothes in the machine). Use commercially available drum cleaning tablets/powder or substitute with vinegar to clean the drum.
When cleaning the drum, also pay attention to the rubber seal on the washing machine door (for front-loading washing surfaces). Clean this part to make sure all the dirt is removed.