Now this is the second time this has happened but the waste trap on the kitchen sink has failed. The first time we were on our way to Scotland and the bottom of the trap seemed to crumble away. I got away with it that time as I was able to do a temp repair using that leak fixing putty I picked up in a B&Q. Last week, first night away, it happened again. The centre part of the waste where the screw connects to the top part disintegrated. No temp fix this time. We think the culprit may be the Zoflora that my wife uses when cleaning up at the end of a trip. Any thoughts?