Many people use bleach as a cleaner and disinfectant. We are often asked when is bleach a good product. In our opinion, the answer is: never. Bleach is not a cleaner, it is a poor disinfectant, and it is very unstable by itself or with other products. You won’t find it in any of our janitors’ closets. We are often asked when is bleach a good product. In our opinion, the answer is: never. Bleach is a poor disinfectant Bleach is often recommended as a disinfectant for the simpl