Q. How does one clean his teeth on Shabbat this year when Erev Pesach is Shabbat?
A. One can rinse one’s mouth and use Kosher Lepesach mouthwash and a floss pick or similar, being careful not to draw any blood. As mentioned in a question above, one may also use a soft dry toothbrush without any paste at all.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit’a