Today I was chatting with my friend online and when I tried to push a button it was really hard to push down. Is my keyboard old or something else?

Today I was chatting with my friend online and when I tried to push a button it was really hard to push down. Is my keyboard old or something else?
With today's keyboards... more likely its due for replacement... if it's a laptop... its gets a lot more complicated and expensive.

Do you clean or blow your off regularly ?

Many times I have seen some dirt or trash get under a key, I blow it off and see if that works, then I pop the key off , clean under it and then pop it back on ** but then my keys do that.