You should look into replacing the keyboard PCB, if ti's a generic model.
It's a Dell, I don't think I can replace parts. I took it apart (again), and the 4 is typing like a 4 again. So to type 44 I have to press the 4 twice. I should have done this earlier, this feels amazing

I recently had the misfortune of having all the rubber caps in a keyboard fall out after opening it
I can actually put this keyboard back together.
Now that we're on the subject of keyboards: the lines under F and J are quite thin. I replace my previous keyboard because I they were worn and I couldn't feel them anymore, which often let me type ;ole tjos amd mpbpdu cam read ot/ (but if you type this in Google, Google knows your hands are off and goes with a correct: "did you mean....").I had to replace my OLD mouse recently because the left button was double clicking every time I wanted to single click.
That doesn't sounds like a dust problem, but it's worth a shot. My current mouse doesn't always scroll when the wheel "clicks", which causes a discrepancy between what I see and what I feel. My previous mouse had the exact same problem, which is why I replaced it. Somehow those things aren't meant to last
