Just For Men Easy Comb-In Color Real Black

I've tried other just for men products. Not sure why but this one just didn't work well and left significant gray hairs than previous just for men products that required mixing. Sure, it felt more pleasant not have to mix the chemicals in this one as there is no burning. But at the end of the day, it's like the dye washed out with plain water. With or without shampoo. I'm gonna look for the green box versions of just for men as those at least seemed to work. This red one didn't make much of an impact. Edit: So I tried using the product again and realized it said to leave it in for 10 minutes. I left it in initially for 5 minutes thinking it was the same timing like the kind with the two mixing chemical version which could burn the skin. 10 minutes did help with leaving more lasting color, but wasn't as good as the two mixing version despite that one burning. But it's enough for me to bring rating from 2 to 3. Leaves hair feeling a bit heavy.