I recommend Daiso interdental brushes.

This is an interdental brush I bought at Daiso.

It costs 2,000 won and has 10 pieces in it, so it's the best value for money.

It has a special nylon coating, so it doesn't irritate the gums and there is no tooth sensitivity!

And it feels soft to the touch, so it hurts less haha.

The interdental mirror is very narrow, so it's great for removing debris. It's good value for money, so I plan to buy it again when I finish this bottle.