It seems that most of the community's advice is to boil the cup to kill off residual yeast spores. However, I live in a college dorm and have no access to anything with which to boil water for the required length of time. No microwave, no stove, no hot plate; nothing. I know people have suggested hydrogen peroxide, but I've got a Diva Cup and I was under the impression that hydrogen peroxide isn't supposed to be used on silicone because it could be damaging. I definitely can't afford to replace my cup, so I'm kind of afraid to try this.
So, I'm currently soaking my cup in white vinegar. Will that be good enough? I've also been eating plain yogurt and taking acidophilus supplements as a precaution.
(Sorry that this is a bit of a repeat topic.)