[HP-35s] Are bad keys fixable?

[Marcio]

Logan, as much as I hate to say it, the truth is that the 35s can't be trusted for serious use. I have a couple of programs on it but none is important enough that would cause me trouble if erased.

The quality is just not there, which is a shame because I like the 35s, its solver, speed (if compared to my trusty 15c) and memory for data and programs.

I decided not to buy a new one. A used 42s in good condition costs more than I can afford so I think I will be back to free42 on my droid phone when not at home.