Yesterday, after doing the umptieth washing up, (we don't use a dishwasher) I decided - on a whim - to do a quick soda flush of the kitchen sinks. The soda crystals took a long time to go down, much longer than usual, but to be fair I have no real thought about what's gone down the sink over the past week what with Xmas cooking and the place heaving with people. I have just a feeling that I may have put the soda down in the nick of time so it's something people may want to think about? ( Particularly if they might have been cooking with any fatty things.)