Another tip is to make sure the little holes at the top are clean...sometimes they get plugged and then it is hard to keep suction. When I spin the Diva, I have to grab the actual base of the cup, not the stem. Then it is very easy to tell if it is still folded or buckled or open all the way. Also, if you gently pull a little on it you should feel resistance if it is open, but not if it's folded.

I had to cut off most of the stem for comfort and proper fit.

I've also had more leakage problems if I didn't start using it right away - like if the vagina is already too wet (TMI, I know) it is harder to get a good seal. So I try to put it in at the very first sign that I think I'm getting AF. Or else what can work is to use a tampon for a few hours, then use the Diva, b/c the tampon will dry you up. But I've had bad luck trying to use it after using a pad overnight.

Emily, regarding it opening up when pulling it out....try to release the suction by gently squeezing the base of the cup, (not the stem) as soon as you can reach it (I can do that right away b/c of the aforementioned trimming of the stem). Once you break the suction it shouldn't hurt to come out. And it will also make less noise!

BTW, I am using mine right now also...and went on a 40 minute ride on a hybrid, very upright, no discomfort whatsoever. But when I first starting using it, sitting in a chair was sometimes uncomfortable until I trimmed the stem.

Good luck!