Now THAT is crazy. Pretty much any bottle of cleaner I've ever looked at specifically says to rinse after using it. But I suppose reading directions is too much to ask Thanks for linking those MSDS's. As I mentioned above, using bleach the proper way is very safe and won't cause any damage. I've been using bleach (usually diluted to about 1:5 ratio, give or take) for many, many years and have NEVER had any issues with it... but then I always rinse it off afterwards!