https://ball-pythons.net/gallery/fil...asan_reply.jpg
Yep, this topic comes up in multiple earlier threads, and the Nolvasan quote above is from a 2011 post when BP.net members discussed this issue and contacted manufacturers, like Nolvasan, to get answers on chlorhex efficacy and shelf life once diluted with tap water or distilled water.
I came on this forum in 2008 when I was introduced to reptile rescue and rehab by a vet tech friend, and spoke to several breeders on this site as well as my own reptile-only veterinarian (I was new to reptiles and really annoying with questions) about the best disinfectants for me. I chose chlorhex for my particular situation. I ended up doing a little animal rescue, too, so I had no problem going through a gallon in a year's time.
Mileage may vary, of course. I'm one to err on the side of caution, so I mix up new batches of solution for my spray bottle every couple of weeks.
Great discussion though (cleaners vs. disinfectants, etc.) Thanks to everyone who contributed to this thread... very informative!