Cleaning wound 48 hours after Mohs Surgery? Dissolvable stitches?

I just had Mohs Surgery 2 days ago. Later today, I’ll be removing the bandage that was put on my cheek after the wound closure. I was told to wash the area with soap and water and then put some Vaseline on the stitches. Also, I was told that the stitches are going to devolve themselves. I was wondering if I have to cover the wound again after cleaning it up and putting Vaseline on? Also why the surgeon used stitches that dissolve themselves instead of regular ones?