Available for in-home and hospital use, air sanitizer sprays work well in killing 99.9% of bacteria for about 24 hours. In addition, some air sanitizer sprays have FDA approval for killing COVID-19 viruses and 24-hour protection from Staphylococcus aureus. You can use air sanitizers on doorknobs, light switches, couches, backpacks, and coats. However, you can’t use them on food contact surfaces. Also, some air sanitizing brands offer a combination of disinfectant and air freshener spray.