Hygrometer

MUST HAVE! So Simple and Easy to Use.

Measure the temperature in your room with a Hygrometer.

When working in the dessert (low humidity), you will need a humidifier to add moisture in the air. 

When working in Florida- for example, there is high humidity. You will need a dehumidifier to withdrawal moisture in the room.

The smiley face will indicate the humidity in the room. It will be sad if it is low or high. In the middle, it will express a happy face. 

Find an adhesive that works in low or high humidity.