I have a bubble on the front left corner behind the cap. It's about 3" around. It's been that way for a couple of years. If it gets bigger I'll get a big syringe and a fat needle and inject glue into it. Then put a big weight on it for a week or so.
I had one lump where I thought, as many, a staple was backing out. I cut it open and it was in fact a screw. I tightened it back down, injected dicor into the slit I made then put Eternabond tape over it.
So far so good.
I will do the same to other screws as they need attention.
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