Before and after your period, sterilise your menstrual cup in boiling water for 2-3 minutes. You can use our Ruby Cup sterilisers to clean your Ruby Cup in the microwave. During your period, simply Empty your cup, rinse under clean running water, then reinsert. In a public toilet, wse a bottle of water to rinse your cup over the toilet. Or wipe clean with dry or damp toilet paper, then reinsert.