My girlfriend is a slob and ignores me everytime I talk to her. What do I do

I moved in with my girlfriend of 3 years a little while ago. Eveyrthing was good and exciting in the beginning, but now I have realized how much of a slob my girlfriend really is. Her room was always a complete mess when I would go to her house before we moved in but she always said it would be different living together. I thought I was bad, but she is constantly leaving clothes, beauty products, dishes and glasses and bags, scrap papers and garabge all over the place. I find myself spending an hour everyday JUST cleaning up after her before I get to other stuff. She also never cleans except the bathroom once a month and she'll maybe do the dishes once every couple months IF I'm lucky... otherwise I'm stuck cleaning everything by myself. EVERYTIME i try to talk to her, she just gives me these looks like I am doing something wrong, and if I bring it up again we fight.

One time she gave me the excuse that since I have been off work for the last month of the summer and she works about 6 hours a day, 4 days a week.. it's only right for me to. But is that fair? I've tried leaving the apartment a mess for a week just to see if she would help but NOPE. I even let the dishes pile up for 2 weeks and just ended up cleaning them myself...