Macbook air key board.

The top line beginning with the letter Q on my MacBook Air seems to be sticking when I type on certain occasions , if I press really hard it will work most of the time .

It seems to be O.K when on other web sites,is it a setting or a fault on the key board ?.

Open in a simple text editor, And sit pressing Q, Q, Q for a minute or 2, don't press hard, just at general 'soft' typing pressure... note each time it misses one, if it misses a few, then i'd say the keyboard may be faulty (but may just need a clean)

If it's under warranty, take to apple store...

if not, then check here:

try and give it a clean