I just bought a lf fleurcup and well I can't get it to pop open. I've only tried a dry run and I know they aren't the best. But it sometimes stays folded up and I've tried a couple different folds and it always seems like it takes forever to open when it does. I have a sm yuuki and it pops right open everytime. I really don't know what to do, I'm waiting for my period to try anymore.