Hello everyone. I was hoping someone could be kind enough to help me with a minor issue. A few months ago, I found a torn washer next to the tap but had no idea where it came from. A few months later, the pop up waste rod has become very stiff to operate but is still functional. I now suspect the washer has come off from the rod but I don't ever remember seeing it on and looking at the ones in shops, I don't see any with a washer. I have no idea where the washer goes so any advice would be appreciated.
http://i.*********/46Nczcx.jpg
http://i.*********/46Nczcx.jpg