Hello,
Thank you for your review,
This can 100% be solved for you, as we have a seal to create a leak proof potty it means sometimes it can cause a vacuum within the potty.
We have a video under our help centre of our website which will direct you with how to open this.
https://www.mycarrypotty.com/pages/help-centre?hcUrl=%2Fen-US%2Fhelp-i-cant-open-my-potty-1005975
Please follow this and your potty will be open and ready to use.
Please do email us at customerservices@mycarrypotty.co.uk if you need any more support.
Thank you