I use the Oscar Blandi one:
I use the powder, not the spray, and I just sprinkle it on the roots or put some in my hands and then run it through my hair that way. I don't wash it out until the next time I shower. I've found it to work pretty well and I don't mind the smell.

I use the powder, not the spray, and I just sprinkle it on the roots or put some in my hands and then run it through my hair that way. I don't wash it out until the next time I shower. I've found it to work pretty well and I don't mind the smell.