Doesn’t stay suctioned!

Tried this out tonight for the first time and maybe I’m doing something wrong, but my baby was able to pull this up no problem! I tried it first without wetting underneath. When that didn’t hold for him I put some water under it. He was still able to pull it off easily. It does suction on and I can pull on it and it won’t come off, so I don’t know what the problem is.

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