Barry the Plumber

I have had 100% success in stopping 2 pairs of taps from dripping. Remove the ceramic cartridges from the taps and immerse them in a strong solution of Descaler. I used 2 sachets of "Oust" all purpose. Put in a small container, put the cartridges in and add boiling water to completely immerse for about 2 hours. Open and close the valves periodically to ensure max saturation. Dismantle if you can and add all the bits. Suggest you wear rubber gloves for this as it is very irritant. Rinse in clean water and re-assemble. It worked for me. Barry