Remove mildew stains from clothing – buttermilk is said to work wonders. Buttermilk for mildew: How to use it.
If textiles have mold stains, they can be soaked in butterm milk and then washed as usual. If there are mold stains on textiles that can withstand high temperatures, such as towels, then you should boil them. If you wash at 60 degrees Celsius, all stains should be gone. The Northern Bavaria portal recommends adding some vinegar to the washing machine during the wash cycle. This has a disinfecting effect.