On 7 Feb, 17:00, Andy Champ wrote:

Isn't the whole point of this to get rid of the greys and bring back the
red ones?

And there's the solution.
We get a bucket of that 'Just for Men' stuff and dye all the greys
ginger.
All the untreated greys find the ginger ones repulsive, so they don't
breed and just die out.

I'm off to arrange sponsorship.