Infrared and Ultraviolet detectors are relatively unknown devices. Between their cost (which is high) and the science behind their operation, most folks shy away from utilizing them.
Upgrade your home, replace your old detectors with new 10 Year Lithium Battery Powered or Backed Up unit(s). Take advantage of the freedom from having to do the annual battery swap, but test them once a month, and put in an emergency evacuation plan so everyone knows how to get out if a fire happens
Through the marvel of Social Media I re-connected with an old college buddy after 40 years... Brought back a lot of memories about the work and the play we had back in those days...