Maintain the Freshness of Your Air Filters
Many people recommend lightly spraying an air filter with WD-40 before installing it in your air conditioning system. This is something you can do every time you change a filter. According to a Money Crashers writer, the WD-40 makes the filter “become enormously more effective.”
This can significantly reduce the amount of dust you inhale at home. “It did appear that the air in my house was cleaner.” Later, when I went to replace a WD-40-sprayed filter, it appeared to have filtered a lot more dust than usual,” the writer said.