How To Fix Number 2 Key on Keyboard

Hi. I have been working on a friend's Macbook Pro 2.33Ghz Model 1211 Core 2 Duo and the number "2" key is stiffer and takes more pressure to enable it. All of the other keys on the keyboard that I tested are fine. Does anyone have an idea what might be going on and how I could possibly fix it without ordering or installing a new keyboard?

Thanks for your help.

Steve

Hi Mayer. Thank you so much for your response. I will check it out. BTW, the MacBook Pro which I am upgrading for a friend took me about 90 minutes to clean because it was beyond cruddy, the keys and case were almost brown from years of built up dirtiness and neglect. I am going to make sure my client starts wiping his machine down to keep it pristine like it looks now All the work I put into it now looks like a totally restored MacBook Pro.

I have looked at many of your posts and responses to many posters questions, and it appears that you really know your stuff about Apple laptops, a real passion for me. Thanks for being there for us.

steve