A woman's "hair math" dilemma has divided the internet, sparking a debate about how often women should wash their locks. Kathrin Downs (@kathrin_downs) shared a relatable conundrum on TikTok ...

Have you noticed the cloudy limescale that builds up on your shower and kettle? Do your freshly washed clothes feel rough to the touch? These are the tell-tale signs that you are living in a ...