Back in the Navy, guys used to joke about retired submariners, how they'd have preventive maintenance schedules for everything in the home, etc. I used to laugh, too.
Just now I realized that because it's a new quarter, I've changed all the air filters in the house, changed our toothbrush heads, done some paint touch-ups, and because tomorrow is the first Friday of the month, it's time to clean the tub in the washing machine and dishwasher, and give all the drains a chlorine rinse.
It was true all along! 😳