Hi LJ. I’m not grey, but I have mine coloured blonde(with foils) and the roots desperately need doing. The ends also need trimming but tbh if i trusted him enough I could ask Mrsmow to do that lol! As for the colour, well my hairdresser comes to my house(she left salon I used to go to and just kept coming to me here) and so only thing i can think of is if she turns up and puts colour/foils on, then when developed I go upstairs and stand upright in my shower to wash everything off on my own, even tho she is meant to do that as she needs to check it. Then go back downstairs for her to look at it. Can’t see any other way x