To start the test simply slide the outter cover down exposing a series of small holes. Suspend the badge somewhere in the middle of the area being tested. You may want to test the master bedroom as you are there for 8-hours each night. Regardless of the results you should test again in the summer heat as formaldehyde double with each 10 degree increase in temperature.

The State of California reduced their acceptable level to 9 ppb. That is difficult to achieve. But children are negatively impacted at just 30 ppb. 100 ppb negatively impacts most adults.

If your results are high, as I would expect you can reduce the level by increaing ventilation. Open doors and windows and a continual fresh air heat exchanger. Also you can seal unfinished manufactured wood surfaces such as the under side of drawers, backs of dressers inside cabinets etc. After you make as much progress as you can retest or hire a certified industrial hygienist that has a direct read meter. Individual items can be isolated by draping in plastic and then measuring the concentration under the plastic.