A wet and dry vacuum does two jobs at once: it lifts dry debris and it washes hard floors. That means it is constantly picking up moisture as well as dust, and moisture is where odours begin.
Where the smell comes from
After a clean, the roller, the dirty-water path and the brush housing are all damp. If that moisture sits until the next use, bacteria develop and the machine starts to smell, often within a day or two. It is the single most common complaint owners have about cordless wet and dry cleaners.
Self-cleaning after every session
The JONR H2 series is built to remove that step from your routine. When you dock it, the machine rinses its own roller and flushes the dirty-water path, so residue does not sit and build up.
Because the cleaning happens automatically, there is nothing to remember and nothing to take apart by hand.
Hot-air drying
Rinsing alone is not enough, so the roller is then dried with warm air. A dry roller does not grow bacteria, which is what keeps the machine smelling neutral between uses.
What it means day to day
The practical result is a cleaner you can pick up and use straight away, without the musty smell or the manual rinse that other cordless models need. It is a small piece of engineering that makes a noticeable difference to living with the product.