What is the simplest way to treat my teeth with xylitol?
If money is no particular issue, then using xylitol drops and xylitol gel is probably the easiest (although really, the work involved in using “straight” xylitol sugar rather than drops or gel is hardly worth mentioning). If for social reasons, you can’t find a moment to rinse your mouth with xylitol where you are (such as at your workplace), then of course xylitol candy is better.
