I found information about dental floss from two different sources that disagree. what should i do?

Floss daily: Dental floss should not be controversial. Floss at least once daily. When you floss, don't just snap it in and out. You use the floss to go under your gum line and "scrape" the surface of your teeth clean, where your tooth brush does not reach. It truly is the single most effective thing you can do to maintain the health of your teeth and gums.

Floss: Unfortunately the internet gives us a lot of of information which can be good and bad, just like word of mouth. Make sure that the information you have read is truly backed by good scientific research. If you do not floss for a long period of time you will probably develop red and bleeding gums which may even result in gum disease which generally may cause tooth loss.

Just floss: You should floss once a day, how? , the idea is to clean teeth surfaces that are facing each other's between teeth by passing the floss horizontally between the teeth and wrap it around each surface and go up and down all the way to the gums, then do the same to the other tooth. Hope that help;).