If you’ve always played Goldilocks with your shampoo and conditioner

– trying and trying to find the one that’s just right – US brand Function of Beauty might float your boat. Land on its site and select your hair type (straight, wavy, curly, etc), your goals (condition, strengthen, fight frizz – you get the picture), then pick a fragrance such as Feeling (F)ineapple or Hibis(kiss). An algorithm will then analyse your results and one of ‘12 billion formulas’ will be created to suit you, root to tip. It’ll even put your name on the bottle. From €40 for a small shampoo and conditioner set, functionofbeauty.com, from 1 April.