I do reactivate mine ( they change color ) but I sure have a hard time remembering to do it. I need some kind of "mental reminder" like changing the smoke alarm batteries when we go to daylight savings. Even that doesn't always work... I change my furnace filter when we go off daylight savings, and last year I bought the new filter at that time but it's still sitting in the garage next to the furnace .
Originally Posted by E. von Hoegh