How to open up the mmm?

Hey guys just wanted to know how do you open up the mmm esc with out
damageing the case?I was cleaning my mmm the other day and noticed
a small leaf with a good size stem jamming the fan blade.I want to open her
up but not sure how to do it the right way.Plus there is a lot of the tracks
red dirt that is in there and i want to clean it out.Don't want to send it in
it takes to long to get back.Just wanted to know form the expert's here.
Thanks.