I work at an outdoor kennel. We use the big 5 gallon buckets for water. We give the dogs fresh water daily but my coworker “Emily” believes that because she wipes the inside of bucket with her hand as she’s rinsing it out, it’s clean. I tried to explain if she ran a scrub brush around inside and outside of it than I wouldn’t have to disinfect them as much. Can u tell me where I can learn online about risks of not thoroughly cleaning ?