There are several different types of air fresheners:
- Canned Sprays
- Oil Warmers
- Gel Inserts
While most air fresheners are designed for home use, there are a few options for cars too. Gel inserts involve less mess and require no heating element. They work simply being a semi-solid gel with the aroma oils infused in it. The scent is released as the gel slowly dries. These can also be used in homes.
Canned sprays are most common and are used to eliminate odors in the air. Some can also elimiate odors in fabrics and carpets. Oil warmers are usually designed to be small devices that plug into the wall. A small bottle of oil is inserted into the device. As the oil warms, it releases the scents into the air.