opening second time around

Hello all!

I have been using my lunnette since march and love it. I am just having one small issue- i can insert it perfectly each morning and then i will take it out to empty it but then when i try to reinsert it it always gives me problems and is uncomfortable. does this happen to anyone else? Somedays i just insert it in the morning, empty it and then switch to cloth pads the rest of the day because of this. Is my vagina too tired? lol I just don't get it cuz it goes in so easily the first time of the day, but if i try to reinsert it then it gets uncomfortable. any ideas???