We have floor to ceiling windows. They have cranks to open and close. We removed the handles of the window cranks, but there's still a big screw. The baby comes around and sucks on the screw all the time. I can't get her to stop. I'm not a huge fan of the sucking, but more importantly, I'm concerned that she could fall on the screw and hurt herself. Is there a plastic cover that I can place over the whole thing? Does anyone know? Thanks.