Mathematical symbols only after spill accident

The last 3 are C79 (from bottom plate Serial No), Its a mackbook Pro 17" bought i believe late autumn 2010.

I have sucessfully hooked up an apple wireless keyboard via bluetooth and it works perfectly - i can type normal letters with this! :)

On closer look, there could be some slight stickyness on the left/upper part of the MB Pro keyboard - although all keys funciton/types allright, only with the wrong type of letters as result. No irratic repetition or so, i can se the respons from all keys (including alt/fn/command keys) in the little window that shows layout (not shure of english name, bottom of third menu in Finder) No keys seem "stuck".

Can i somehow get into the keyboard itself and clean it...?

Derrick's definitely right, hooking up an external keyboard would obviously work just fine, the problem is the option key.

thanks for another down vote rab. It's just great that you are so smart you don't have to test anything to know what the problem is.

Here's a video on how to remove the keys on your model, I would try removing the option key and those around it and clean with a Q-Tip dipped in alcohol, give it plenty of time to dry before testing : http://www.youtube.com/watch?v=jSpPlMdGv...