"Disappointing" star star_border star_border star_border star_border I normally avoid gadgets but this one sounded promising. It probably works brilliantly if you have the tap that it was designed for - but it doesn't fit on any of our taps, bath, sink or basin. Managed to squeeze it onto a basin tap but because of its solid colour you can't see whether the tap head is in contact with the liquid. A clear plastic bag and a clothes peg works a lot better and you can see where the liquid is and whether it is fizzing and clearing the limescale. Sadly a complete waste of money. Mrs Parnell - 01 July 2021 support_agent A note from the team We’re very sorry to hear this and will be in touch shortly to sort a refund for you. Our buyers have confirmed we do have a version for flat head taps coming in spring 2022..