Dental hygiene advice often focusses on the importance of brushing at least twice a day because if you do this you have the foundations of a good dental hygiene routine in place. Something that is often left out is the importance of flossing. Here are some reasons why you should make flossing part of your daily bathroom routine. Prevent bad breath Lots of people are left bemused as to why they still have bad breath despite brushing and using mouth wash twice (or more) a day.