How to get stains off?

R • A something year old college student, working, single, and bisexual. ♻️🏳️‍🌈💞

Hey guys! I have a diva cup and I LOVE it. But during my last cycle I really made some some stains on it and I've soaked it and used a toothbrush on it!! It's on the upper part. Please help it grosses me out lol.