As advised by my dentist, I have used a waterjet flosser for some years now. They work very well for me, but I cannot find one that lasts for more than a few months without breaking down. I have tried various different makes, but they jam up or bits fall off. The latest one starts randomly buzzing in the middle of the night and needs a sharp thump to make it stop. I haven't tried an air flosser yet, but am reluctant to keep spending money on things that work for such a short time. Any advice or recommendations?
Is this behaviour appropriate.
how are schools handling students who memorize books but can't actually decode




