What is Menstrual Cup Foaming Cleanser? Be You Menstrual Cup Foaming Cleanser cleanses your menstrual cup, ensuring that it can be used for up to 10 years. This 100% natural foaming cleanser contains no harsh ingredients and is suitable for sensitive skin. It is also pH balanced so will not affect your natural vaginal pH level. The innovative formula uses the pump to create a foam, rather than unnatural foaming agents like sodium lauryl sulfate. It will last up to 200 washes. For best results use with Menstrual Cup.