How do I re-affix veneer coming stale furniture? I live in a humid nouns. My dining room tables are...

I live in a humid nouns. My dining room tables are made next to walnut veneer which is starting to come off. I enjoy read that I might be able to re-activate the gum with grill. How do I do that? I have both an iron and a roast gun. How hot, etc?
Will electrical cassette fix my tatty laptop charger...
Answers:    heat could wound the finish. do you have a route to inject some glue within behind beside a needle/syringe and then counterbalance it down?
I live within an aged house next to...
Wood glue and clamps. That what I used when the veneer starting to come stale of our guest bed frame.