HP 15C CE key bounce

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Hello everyone here in this great forum.

I've been using HP calculators for quite a long time (HP 42S, 48G, 28S (lousy battery cover!) and a prime) and I'm very enthusiastic about them.
But unfortunately I now have the same keyboard problems as you with the HP 15C CE.
I'm really upset. It's such a great calculator, but you can't work with it with this keyboard!
Out of frustration, I bought a second calculator, but its keyboard is also bad!

There are also developers of this calculator here in the forum, do you have a solution for this problem?
Please write your opinion.

I hope I don't have to throw it away, because it's hard to sell something like that.