You can also rinse both pieces separately for a deeper clean, if you prefer. To be honest, I don’t clean the hose every time I use my Little Green cleaner. I’m just that lazy. But it’s very easy to do: First, push the button on the back of the brush to detach it from the hose, and then attach the included HydroRinse Self Cleaning Tool. Some Wirecutter staffers have said that their Little Green unit didn’t come with the HydroRinse tool, but it’s a weird, tiny doodad that’s easy to lose in the box—and once you find it, you’ll probably be like, “What’s this?” It’s a little piece that connects to the end of the hose to clamp it off. After you put it on, just run the Little Green cleaner with the cleaning solution or plain water, and the tool keeps the liquid circulating, without any leakage. (And when you’re finished, you can clamp the tool right onto the outer part of the hose so you don’t lose it.)