Wash the cup with just water or use Sirona Menstrual Cup Wash each time you remove, empty and reinsert the cup. At the end and beginning of your periods, sterilize the cup by putting it in boiling water for 3-5 mins. Dry it and keep it in a safe place. For hassle-free sterilization, you could use Sirona Menstrual Cup Sterilizer. Watch this video to get a better understanding on how to maintain the cup.