I had Yag laser treatment for removing a large sunspot on my face, plus some small ones. Didn't get any postcare instructions and "doctor" has gone away for a week. Should I wash my face, with what? Should I put a dressing on it, or an ointment, what kind? When will the dark brown crust come off and how should I care for my skin then? All I was told is to put high SPF sunblock on daily. Thanks for any advice.