Daily flossing is an effective way to clean teeth where regular brushing can't reach. To floss properly, take 18" of dental floss, wrap it around the middle finger of each hand, and pinch it between your thumb and index finger. Pull the floss taut, then slide it gently between each tooth and under the gum line. Slide the floss up and down the side of each tooth to remove plaque buildup. Be sure to use a clean section of floss as you move from tooth to tooth.
If your gums bleed when you floss, that is a sign that there is inflammation there. Continue to floss daily and you will see that the gums bleed less and become healthier. If you don't see an improvement within two weeks, you probably have some tartar built up below the gumline (or maybe even a cavity between the teeth). We would advise that you call to schedule an appointment.