The Nibot Waterful cordless oral irrigator is good.

Nibot Waterful Wireless 360ml Oral Irrigator Full Package

I'm using it and my teeth are getting healthier.

Even after brushing my teeth, I noticed foreign substances coming out.

I think brushing with just a toothbrush makes it impossible to completely remove foreign substances. It also allows you to massage between the teeth.

It feels so refreshing and invigorating, I love it.

It's convenient to use because it's wireless, and it seems to last about 15 days on a single charge. I recommend it.