For very dirty brushes are likely to have a bacterial stacks, you may want to use this recipe. Because Apple Cider vinegar can help kill bad bacteria potentially harmful while helping clean the brushes at the same time.
First of all, mix one tablespoon of pure apple cider vinegar, half a teaspoon of dish soap, and one cup of warm water in a glass. Place the kuasmu into the mix and leave to infuse.
Afterwards rinse each brush with water either using dinginblalu put a dry towel on top. Let them dry out overnight.