We are now doing Mew's mouth irrigation three times a week. We moved it to mornings instead of evenings so we could get it over with, for the day. That way, she doesn't have all day to dread the procedure. Believe me, she knows when the appointed day arrives. She keeps her calendar with more regularity than we do our own.
Routine is paramount with her. One could set a watch by her eleven a.m. morning nap.
Funny thing. After a week or so, she adjusts to the time change when we move away from standard time or back to standard.
I am sure that, for a while there, she thinks our watches are broken . . .