Can you lift up and clean underneathe a lenovo g580 laptop's keys?

I would just use an air canister firstly, maybe some qtips with a tiny bit of alcohol on it if you've got some gunk. Then maybe consider taking the keyboard off for more detailed cleaning if option one and two aren't working.

Detailed instructions for such below:

http://laptoppartstore.over-blog.com/m/article-120738064.html