Be it red, green, blue, or amber, consumers spend millions of dollars a year on mouthwash. Many mouthwashes are strictly cosmetic—they leave your mouth smelling fresh and feeling tingly for a few minutes but don’t appreciably affect oral health. If you want to fight plaque, look for mouthwash containing cetylpridinium chloride or domiphen bromide, ingredients that dissolve this troublesome film of bacterial goo. If you want to fight cavities (especially cavities that form between teeth, where your toothbrush can’t reach), look for an anti-plaque, anti-gingivitis mouthrinse. Fluoride mouthrinses help prevent tooth decay, too, but should not be given to children age six and younger because they may swallow the mouthrinse.

To get the best results from your mouthwash, follow this routine.