Does anybody know of any way to adjust the sensitivity of a smoke detector? Mine are driving me crazy! Background: I bought my house in 1988 from a local firefighter, he installed hard-wired smoke detectors in 3 locations, one on each floor. This past summer I was doing some painting of the ceilings, and I discovered that smoke detectors are supposed to be replaced every 10 years! Who knew?? So, I bought 3 new hard-wired detectors with battery backup, swapped them all out, threw away the old ones that looked like they were from the 70's. Tested perfectly, tripping one makes them all wail. Fast-forward to the winter, now that all the windows are closed. Now, everytime I use my oven, I have to pull them all down and put them in a plastic bag. Otherwise, the slightest wiff of smoke and they all start beeping. With a propane-fired oven, all I have to do is turn it on. Turning the range hood fan on High doesn't help. What's up with that? And what can I do?