How can I fix my bosch washing machine WFMC3301UC?

I have a front loader Bosch washing machine WFMC3301UC. Liquid detergent has run down behind the front plastic cover on the front of the door frame. How can I remove this circle cover to get the mess off? It looks like there is a notch on the the top where I could put a screwdriver, but I am afraid to break the plastic.