you need to go back tothe makers and buy two new insterts and then fitt them . this is the problem with 1/4 turn taps the disc,s get scratched and that is it.
I hate them, the number of times I have had to change a pr of kitchen taps as no one knows who made them
erj
October 2009
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix plumbing.