This is the conventional method – start with this and muck about until you find what suits. Safety tips… anchor floss well and keep usable section to 25mm – 40mm where fingers are reasonably close. Avoid dragging floss over gum papillae (points).
Add-ons Things that help toughen the surface.
GC’s Tooth Mousse has been used for a long time, it works and is proven safe.
Others reduce sensitivity – and do this, but they don’t address cause.
Have a look at Night-bruxing page. Paint-on’s can work well, but it’s pointless if you keep on damaging the tooth.