DH of many, many decades mentioned just now that he finds my use of 'wash my teeth' rather than 'brush my teeth' charmingly idiosyncratic.
No one has ever mentioned this before , thought, to be fair, it's possible that the number of people I ever mention my teeth to is pretty restricted.
So, lovely people of MN, AIBU to say 'wash my teeth' rather than 'brush my teeth'.