Are disposable toothbrushes in those hotels clean?

Very clean. They are all unopened disposable toothbrushes, but they just don't work well. Sometimes it's similar to brushing the heel with a hotel toothbrush, because toothpaste is tasteless. If it is inconvenient, you can take a set of travel goods with you. If it's too much trouble, just rinse it with water. Actually, it's no different from using those toothbrushes