Something stuck underneath my keyboard keys?

I think there's some sort of dirt stuck underneath my keyboard and it keeps moving around underneath so I can't press on certain keys properly. Like right now I can't firmly press on the "-" key before it was the letter "s" and at first the "ctrl" key.

It's really getting annoying because of course I can't type properly.

Is there any way to check and see what's going and/or remove whatever is underneath?

Any help will be greatly appreciated.

Thanks

luckily u bought the macbook pro so if u feel confident enough pop out the key remove whats under and pop it back... if u had the macbook key then your up a creek

try turning it upside down and get a can of compressed air and blow it in the keyboard. this happened to my old pc and it did the job.

Well it was small enough to fall into the keyboard, it should be small enough to fall out. Press a key next to one that can't go down and then hold your Macbook upside down and shake it. Be careful not to drop it, if you do, don't blame me for my method. Best get a friend to help, then one person can hold it and shake, and the other can push down multiple keys to try and create more gaps between the keys for the object to fall out.