Thanks for the replies. I decided to swap the bed for another one that I have. Now it looks much better. I'm not sure what happened, or why that made a difference, but I'll live with it.
No, I hadn't used hairspray or anything on this bed. I just used blue tape and that was it. Nothing different really. It started doing this after the printer wasn't used for about 2 or 3 months. I'll just leave this other bed on it and go on from here.
Thanks again.