I have been raving about my new Magic Ride Pro, but now have a concern. When I push down on the deck, between the front and rear foot straps, I hear a squeaking sound, like it could be coming from the foam core. The deck flexes a little when I push my palm into it but not to much. The board is brand new and has been used 10 times. What do you guys think about this? Manufacturer defect? Delamination? I take the vent screw out after every session, and the board is stored in my house when not being used.