Fit issues on heavy days

Rosie

Anyone else struggle with getting a good fit/seal on heaviest days? No drama, perfect fit on all other days bar 2 & 3, my mega heavy days! I don't get it. Its not that the cup is full I just can't seem to get it to stay put and have to redo it all the time!

I have used a cup for around 6 years except for the 1.5yr I was pregnant/post partum and its only been an issue the past 6months or so. Any clues/tips very much appreciated x