I have been dying my hair since starting to go gray in my late teens. I like the Just For Men products.. go a bit lighter and leave it on longer to get more of

I have been dying my hair since starting to go gray in my late teens. I like the Just For Men products.. go a bit lighter and leave it on longer to get more of the gray. It works ok -- lasts about a month. My wife prefers the dyed hair with a touch of gray and not all gray.