It's true, it smells moldy after a few uses.
I saw some reviews stating it starts smelling moldy after a while; it took about two weeks for me. The spraying action is excellent, but the smell clings to hair. I tried to empty it every night to dry it out, washed it with soap and vinegar, the smell was there to stay, I had to toss it. I've seen different versions of this mister used by hairdressers, and it never smelled. Not sure what it is. I just switch to the regular spray bottle to avoid frustration.
Rating: 2 stars