"waste of money" star star_border star_border star_border star_border These sounded like a great idea so bought a pack for me and a pack for my Mum. I've been using for a couple of months. I've just cleaned my outside drain and found the sticks washed away lying on the drain grill. I wondered why I couldn't see or smell the sticks after a couple of days but assumed they must be slowly dissolving further down, out of sight. Obviously not the case. Seems like a pointless product? Miss Faruk - 28 April 2021 support_agent A note from the team The sticks are designed to sit in the u-bend - it sounds like these were unsuitable for your sink.