Preventive measures:

• Keep the air conditioner on in the summer; it cools, dries, and cleans the air.      
• Close the windows at night to keep out pollen and mold.   
• Close car windows when traveling.           
• Don’t dry laundry outdoors.           
• Take a shower after spending time outdoors to remove particulate matter.             
• Spend more time indoors when ozone levels or pollen count is high; outdoor exercise is not recommended during these times.
• Check air quality alerts at AIRNow - Home, where the Environmental  Protection Agency lists air quality forecasts. 
• Do not attract roaches by leaving food and garbage out.                
• Use roach traps or poison baits; limit the use of more toxic sprays.            
• Keep the kitchen clean.