John Forbes wrote:
Try drilling a 1/4” hole all the way through at the fattest point. If there is water there, it will weep out. Make sure hole is unobstructed and then leave inside or in warm area for a week and see if swelling goes down.
I did this, but at the same time had heavy weights on it. It made a drastic improvement. To finish the process I put resin in the holes then put lots of weight on it while drying. I think this helped it adhere the glass back to the inner foam. It's not perfect but it works now. Thanks.