Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: Why does sugar cause tooth decay?
It is not really the sugar that causes decay. Sugar however provides a friendly environment for bacteria that do eat away tooth enamel and introduce decay. If you do eat sugar, rinse afterward to make sure you are not contributing to a bacteria friendly environment.
Sugar feeds bacteria, producing acid that erodes tooth enamel.