Leaky Diva Cup

I bought my Diva Cup prior to last cycle.  I LOVED it at first, then on my last heavy day it leaked.  I was bummed, but then with lighter flow, it was OK again.  I chalked it up to bad insertion.  

So this cylce started, here we are on bad flow day #1 and I have had nothing but leaks ALL DAY LONG!  I have taken it out and re-inserted more times than I can count.  I have yet to achieve a good seal today. At first I though it was the tiny holdes which I noticed were clogged.  I cleaned thoroughly, but it's still leaking.  I have tried a bunch of different insertion positions, spun the darn thing around both ways, done kegels, and tugged to see if the suction was good.  Everything FEELS fine until it leaks.  I checked and sometimes there's menstrual fluid in the cup, sometimes it's empty.  What gives?  I'm starting to feel vaginally challenged.  ARG! 

Edited to add:  I have had one vaginal birth and use the size 2.