MonthlyCup instruction points summarized.
The MonthlyCup guide says to wash your hands, empty the cup according to your flow and no later than 12 hours, and release the seal before removal instead of pulling the stem alone.
The same guide says to follow the supplied instructions, boil before first use and between periods as instructed, dry the cup fully, and store it with air circulation. It also says to replace silicone that is damaged, sticky or noticeably changed.