Over the last few weeks Water Witch Hose Company in New Milford says they have seen a spike in Carbon Monoxide Alarms. CO Detectors have a fuel cell or life span of five to seven years.  Fire officials are calling on residents to check batteries regularly and if the system is hard wired--give the company a call to see if it's time for a swap. If the CO defector goes off, evacuate the house, but keep all windows and doors closed so firefighters can monitor and see if there are carbon monoxide levels in the home.