I recommend the no-wash treatment bar.

This is Tone28's No-Wash Treatment Bar for damaged hair! Since it comes in a solid bar form, I've been using it for about 4 months, and it's really... wearing down slowly. I think I'll be able to use it for a long time. Because it's a no-wash product, it's convenient; you just apply it and don't rinse it off. After shampooing, you simply rub the product directly into your hair to absorb, and that's it~ It has a herbal scent that I love, so it makes me feel good every time I use it.