How do I deal with my roommate?

One of my roommates has OCD. Basically what this means is that she has to have her environment exactly right and nothing can be out of place. I try to be patient with her because I know of her home situation (semi-abusive controlling father) but I am almost at my wit’s end with her. She made up a chore chart for everyone last semester. When she made it this semester, she made a little section telling people exactly how they should do the chores because no one ever did the chores quite to her satisfaction last semester. If someone makes cookies and leaves the cookie tray on the stove, she complains about it even though she has never used the stove but won’t clean it herself.

There are myriad other little things that have built up and I’m not sure how much longer I can deal with these little behaviors before I flip out on her. Obviously, I don’t want to do that. I would talk to her about it but it’s not the kind of thing that she would take well. I’ve tried talking to her about some of these things and she either doesn’t understand why something gets on my nerves or she doesn’t try to change the behavior. How do I keep from flipping out on her?