I clean out my machine with every bobbin change, no way could I wait once a month. Not my job to change batteries.
We start day light savings time next weekend, when they tell people around here to change batteries and again when we go back to central standard time. I like this time better.
3/02 was out oldest Grandson's Birthday, 24 and starting with The Old Guard 3/10. He is in the Army, been to Iraq twice.