Sir, I would like to make further comments to J. Hartley's letter on Spit don't rinse.1 One response to this letter cited the evidence from some well-designed studies,2 while another quoted from a paper recommending the 'spit don't rinse' message as an integral part of oral hygiene instruction.3 However, an additional environmental benefit has not been mentioned.

Research by SaveWaterSaveMoney has revealed that 64% of 7-10-year-olds admitted to leaving the tap running while brushing their teeth. Turning the tap off while brushing and not rinsing the mouth out when finished are two simple yet effective ways of saving water in the bathroom. Not only could it save around 12 litres of water every time, it also saves money.4

The long-term effects of 'spit don't rinse' will not only preserve teeth, but also save water. That's why spitting is better for the environment too!