A smoke detector chirping at 3 a.m.
It's always 3 a.m. and it's always the one on the tallest ceiling. Why do they only chirp at night, and is there a kind that lasts longer?

It's always 3 a.m. and it's always the one on the tallest ceiling. Why do they only chirp at night, and is there a kind that lasts longer?

The cycle runs nearly three hours and I still towel-dry every cup because water pools in the tops. Is there a setting or a trick that actually helps?
