Skin Issues that Will Not Heal

This latest round of skin breakouts are not healing up even though he is on medication.  I have to wash his skin every morning with the Malapet/Malaseb shampoo and everyday by mid-afternoon he's breaking out and smelling yeasty again.  It's ongoing and I don't know what to do to resolve it.  This infection is on both back legs and under the front left armpit.  Here are latest pics.