I use a small diva and have for about a year and a half? Maybe? As you all probably know Diva recommends replacing the cup yearly. I also don't see anything wrong with my cup it's hardly even discolored! They used to say cups could be used for up to 10 years if I am not mistaking. Anyway on to the point for all you long term cup users who have replaced cups what made you decide it was time for a new one?