Cup won’t open

I’ve been trying my new Saalt cup (bigger one) for 3 days now and I’m struggling to get it open every time. I’ve tried all the tricks I can find online and none of them are working. I previously used the smaller Diva cup and didn’t have this issue but it was uncomfortable using it since I had a baby so I wanted to try something new.

Does this mean I might need the smaller Saalt cup?