Reverse conditioning, also known as dirty conditioning. Instead of reaching for shampoo first, creators are applying conditioner to unwashed hair as soon as they step into the shower. ‘You then shampoo away any excess residue, leaving hair softer, more manageable, bouncy and strengthened, but without the weight of a heavy conditioning mask.’ ‘Applying conditioner to your ends before shampooing, without rinsing it out, can also help protect them from knotting together. ‘Dirty conditioning creates a protective barrier that helps shield hair from the harsher, stripping effects of shampoo,’ he explains.