Whats that smell?

My mop heads smell like wet dog. I have 2 dogs but they dont mop.
Why isnt my mop heads cleaning and drying?
I have been having to at the end of the night before bed, taking them out. Cleaning them and the housing unit and air drying them.

Same! My mop heads also stink.

You can replace them. There are extra in the box that came with the unit.