Try using a Daiso interdental brush.

I primarily use Daiso dental floss and have even written a recommendation post about it. Just like the floss, I want to recommend their interdental brushes as well, as they are excellent. Interdental brushes are more expensive than floss, so I don't use them every day. I think I use them about 2-3 times a week. Sometimes my gums bleed, but it isn't an injury; it's a sign that my gums were weakened, and they say that using an interdental brush helps improve gum health. Just like the reason I recommended the floss, this product is economical and performs its job well. I didn't feel the need to spend more money looking for something better. It also comes with various size options. Unless you have noticeably wide gaps between your teeth, I think choosing the thinnest size like I do would be a good idea. I plan to continue taking good care of my oral hygiene with Daiso interdental brushes.