Yeah glad to hear it. If you don't see any more signs of it you won't need to keep applying neosporin. Not sure how often you were changing it before but it's a good idea to change the water frequently.

I find that my garters and my kings are my most consistantly active snakes and need their bowls changed more often than my other colubrids, they tend to visit the water bowl more. I change the water a couple of times a week and usually a good scrubbing of the bowl weekly with soap and hot water works wonders (I use betadine, but just soap works great). Then every few months I'll give them a good bleaching too (with a really good rinsing afterwards).