I have a 2014 MBP that was working fine (except for some screen defects that I did not get fixed before it was too late for the warranty)... Until I left it in

I have a 2014 MBP that was working fine (except for some screen defects that I did not get fixed before it was too late for the warranty)... Until I left it in my basement for a few weeks, i.e. in a slightly cold and humid environment. Now, the keyboard is broken: I need to press multiple times on each key (it's better now that it has dried a bit, but not perfect). The trackpad is also broken: only hard-clicking works. Next step is to open and clean it up but I don't have much hope.