Hi! That's a great question that we've heard more than once. We're compiling the data, and so far we simply don't have enough data around water flossing vs string to draw any conclusions. In general, it definitely appears that any flossing is better than none with a caveat:

There are flossing "responders" and "non-responders" that we are looking into and hopefully we'll have another post to share soon. It appears that the oral microbiome may be able to predict whether flossing (or perhaps water flossing) actually improves your health because for some it does not have as much of an effect as others.