How do you floss in between really crowded or mis-shaped teeth?

Dener N.
Ribbon floss will slide between teeth better than the stringier type. You should also be scrapped the floss along the whole side of the teeth rather than sawing back and forth near the gums. Sliding the floss slowly down should help. Also, your dentist may have a plastic guide to help you maneuver tricky spots. Dentists usually give these out for free