My 16 week pup had his ears cropped by my vet at 11 weeks old. After the crop we waited 2 weeks for ears to heal before we started posting. I took him back to the vet to have them post his ears and but on the last post I noticed that his ears we wet at the bottom so I took the wraps off and took him back and they said he had a little yeast in the ears and a little on the back side of the ears. They gave meds to drop in his ears but told me to use alcohol on a gaze to scrub the back side of his ears. Is that safe to do? Or is there a better way to get rid of the yeast on the back of his ears? Is a very mild case of yeast.