I am kind of worried about sealing; I can grasp the bottom of the cup, but I'm pretty small, so it's been impossible to turn it. And with the Diva Cup being so long there's no way I can get my fingers to the rim to 'swirl' it. I just re-inserted it and let it pop open pretty early, then rotated it while it was still halfway-inserted, so we'll see if that works. Hopefully my vaginal canal doesn't burp again.
And this was just a very long-winded way to say: any tips would be greatly appreciated!