Can the alarm be affected by household chemicals or sprays, and what should I do if it is?

Yes, high concentrations of other chemical gases can pollute and damage the sensor, causing temporary errors or permanent damage. Do not use chemical aerosols such as air fresheners, hairspray, perfume, insecticide, or spray paint near the alarm. If a false alarm is suspected due to chemical exposure, remove the alarm and place it in fresh air with the power off for at least 30 minutes and up to one week; if the LCD does not return to 0 PPM after one week, the sensor is damaged and the alarm must be taken out of service.