hehe..... uh-huh, I don't know about you but in my case, the problem lies more with the operator of the keyboard rather than the operation of the keyboard. :) :) :)
Me, I live in a building with enough dust dropping out of the air to clog up anything.
I often have to open up my computer and dust out the case.
Usually about once every other week.
My optical mouse doesn't clog up as often or as bad as my regular mouse.
But my keyboard..
My keyboard is another story.
I'll hit keys and have them not register.
Usually not a problem, stuff just doesn't end up capitalized, but at other times letters drop out on me.
And then there's my standard typos to figure into the mix!
So I never know if it really is me or just my keyboard.