From one Winston to another, in our experience in hot spots whether it is a bacterial or yeast issue we use TrizChlor wipes. I make sure to use these every day or two. I get his facial folds, and then really get into his tail pocket because of the moisture build up. These pads have a natural drying agent in them.
Here is a link to amazon, not prime shipping but for less than $10 why not give them a shot.