Apple Extended Keyboard Repair Advice

I'd like to know for sure what causes these keyboards to fail. I have to replace mine once or twice a year. I have been doing that for 12 years.

The video at Trying to FIX : Faulty Apple Keyboard Model A1243 (https://www.youtube.com/watch?v=zxiPxyLF...) suggest water being the cause of failure. I am not spilling anything on my keyboards. To me, they seem to just wear out. Once a key starts failing, the keyboard will be usuable for a few weeks. After that, there will be at least on dead key.

The keys that fail always are among the most used letters.

So, I dunno if the liquid thing is the whole explanation.

@carlarogers - dust, humidity or something in the air where your system lives is what I would focus on.

Is there any chance, if it's one single key that was destroyed from a single splash of water (which I know I did), to repair the connection? Or is it still not worth the hassle of taking it apart?

Mostly trying to keep it out of the bin and not throw away a whole keyboard into the landfill if I can.

I own a Apple A1243 Wired 2-USB. 2007

@allie56770 - Did you look at the YouTube vid? It’s a bit of work to take apart and depending how far you go you might not get it back together. Other than having a second keyboard to raid for parts there just isn’t much hope. Apple designed these as throw-away’s!

@Danj I did. But the video doesn't show putting anything back together, they just say "if it was a couple connections to repair it would be doable." A bit of work doesn't deter me too much for a single key if I could follow a step-by-step.