---
title: 'Mouthwash Hack for Robot Vacuum Dirty Water Tank'
source: 'https://youtube.com/watch?v=ykNDozx7vBE'
video_id: 'ykNDozx7vBE'
date: 2026-08-06
duration_sec: 49
---

# Mouthwash Hack for Robot Vacuum Dirty Water Tank

> Source: [Mouthwash Hack for Robot Vacuum Dirty Water Tank](https://youtube.com/watch?v=ykNDozx7vBE)

## Summary

The video demonstrates a practical household hack: adding mouthwash to a robot vacuum's dirty water tank to prevent bacterial growth and odor. The creator tests the method over a week and shows the results, revealing that the water remains relatively clear and smells like mouthwash instead of becoming black and foul.

### Key Points

- **The Hack** [00:00] — The creator pours mouthwash into the robot vacuum's dirty water tank, based on online advice that it kills bacteria and reduces odor.
- **Testing Period** [00:17] — After a week, the creator checks the tank. Normally the water is disgusting, but now it smells like mouthwash.
- **Results** [00:30] — The water is only slightly dark, not black as usual. The creator notes that the black color is actually bacteria, not dirt.
- **Conclusion** [00:46] — The hack works: the water is less dirty and smells better, though the creator still finds it disgusting.

### Conclusion

Adding mouthwash to the dirty water tank of a robot vacuum effectively reduces bacterial buildup and odor, making maintenance less unpleasant.

## Transcript

Look what I'm pouring in my robot vacuum dock. So my robot vacuum has a mop and the dock scrubs that mop and cleans it and puts all the dirty water into this tank. But the tank gets really dirty and smelly. So I read online that pouring mouthwash in the dirty water tank kills all the bacteria and helps it not stink as bad.
So let's see if it works. Alright, so it's been about a week now and normally the water in here is disgusting. So let's go check it out. Right now it just smells like mouthwash. Let's pour it out and see how gross it is.
You can see the color of the mouthwash. And look. It's only like a little bit dark. Normally the water is black and I used to think that was dirt but it's actually bacteria.
So disgusting. It smells terrible right now. Doesn't even smell.