How to Kill Dust Mites With Borax

How to Kill Dust Mites With Borax. Dust mites are tiny arachnids (spiders), only 1/100 of a millimeter long. Colonies of them can be living in your bedroom and family room, according to the BBC Home website. As much as one-tenth of the weight of a pillow you have used for six years may be dust mites and their fecal matter. The mites thrive in moist, humid environments; the best way to kill them is to dehydrate them. Borax powder is one of the more effective means of killing dust mites by dehydrating them.

Pillows are a perfect habitat for dust mites.

Things Needed

  • Borax
  • Washing machine
  • Vacuum
  • Mop
  • Bucket
  • Detergent
  • Sponge

Step 1

Strip all bed linens -- blankets, sheets and pillowcases -- as well as drapes, bedspreads and bedskirts in an infested room. Throw out old pillows and replace them with new ones.

Step 2

Wash the bedding and drapes in hot water with regular laundry detergent and 1/2 cup of borax. Stop the washing machine when it is full of water and let it soak for 20 minutes. Then re-start the washing machine and let it finish its cycle.

Step 3

Sprinkle a fine layer of borax powder on carpets after removing pets and small children from the room for the day. Let the borax work on the dust mites for a few hours. It eats through their exoskeletons, dehydrating them. It can also suffocate them. Vacuum up all traces of the borax powder at the end of the day.

Step 4

Wash the floors and furniture surfaces thoroughly with soap and hot water before bringing the clean linens back into the room.


  • Don't keep stuffed animals in the bedroom unless they are washer- and dryer-proof and can be washed periodically.


  • Borax is for external use only. Don't allow pets or children to eat it; don't allow it near your eyes, nose or mouth.


  • BBC Home: Dust Mites
  • Earth Clinic: Mite Infestation Cures
  • University of Nebraska Lincoln: Controlling House Dust Mites