For me the water flossers (oral jet irrigators) are the best solution yet. I was never able to floss correctly with a wire, especially between the teeth in the back row but then my dentist told me about "the jet thing from amazon" and I wish I had it a lot earlier because it's so easy to use and quite efficient. (Just don't jet your gums with the highest power; it can hurt and make your gums bleed)
She had been compulsively flossing, but this device has reduced that desire.