I have found using these quick clean steam bags that usually used for breast pump parts to be the best way to clean my cup after my period is over. : r/menstrualcups
Quick Clean Micro Steam Bags - Mini Jake
Quick Clean Micro-Steam Bags United States
Amazon.com: Medela Quick Clean MicroSteam Bags, Sterilizing Bags for Bottles Breast Pump Parts Eliminates 99.9 of Common Bacteria Germs Disinfects Most Breastpump Accessories, Yellow, 12 Pack : Baby
Medela Tender Care Hydrogel Pads
Microwave Steam Sterilizer Bags | Zomee Breast Pumps
Micro-Steam Sterilizer Bags
Amazon.com: Medela Quick Clean Micro-Steam Bags for Bottles and Breast Pump Parts, 5 Count, : Baby