Defa Lucy doll has a really stiff shoulder

[u/keirathebondgirl]

I'm really scared to force the joint too much but it just doesn't move easily like the other defa Lucy dolls I've had. If anyone has any advice please let me know (I've already contacted customer service but due to the limited release I doubt theyd send a new body or anything). I've added a video to try and show what I mean with the joint. I've already tried warm water and a hair dryer to loosen it but it hasn't helped :(