I’m 49 and almost completely grey. I’ve been getting my hair coloured at a salon for years to a darkish brown. I can’t afford to keep going ever 6 weeks and need something to temporarily cover the roots. I’ve tied L’Oreal magic touch (or called something like that) and Josh Wood—neither are any good. My hairdresser has recommended Wow colour. Has anyoje used it? Or there other good options out there?