Use a piece of dental floss of 20 to 25 cm in length
Put the ends of the floss together
Tie three overlapping knots in the same spot
Pull the floss taut to tighten the 3 knots
This way, the floss loop will not loosen up when it is in use
When you floss, the fingers of both hands should pull the floss loop taut
Control a 2 cm segment of the floss with your index fingers and thumbs
When you need to change to a clean segment of the floss,
simply move the fingers sideways
