We certainly hope that you, presumably an adult, have mastered the art of brushing your teeth. But there are plenty of other less-obvious things you can do to keep those pearly whites healthy and happy. Here are a couple of surprising habits that might be damaging your teeth without knowing it:

1. Chewing ice cubes

It's frozen water, natural and sugar-free, so you might think that ice is harmless. However, the opposite is true. Chewing on hard and cold ice cubes can chip or even crack your teeth. Moreover, chewing on ice-cubes can cause problems with existing dental work such as fillings and crowns. And if your mindless chomping irritates the soft tissue inside the tooth, regular toothaches may occur. Additionally, hot foods and cold foods may trigger quick, sharp jabs of pain or a lingering toothache. Next time you get the urge for ice, chew some sugarless gum instead (1).