Pump Seems To Big

Hi, So far I'm really pleased with how my lips are looking but it seems that the lip area of the pump is to big for my face and it's not making a good seal. I'm not able to pull the pump out because I have to push down on the sides til I can feel some suction working. I've tried putting fabric on the ends and other things but it's still not sealing the way it should be? Does anyone have an idea! I still won't stop using Lucious Lips but it would be so much nicer and easier to use if it fit better. I've turned it over and bent over even! Thanks, CAROL