For dust mites, use aromatherapy, they hate it and grapefruit seed extract(GSE), take 32 onzes spray bottle filled with distilled water add 50-100 drops of grapefruit seed extract, shake it, and spray almost any surface, this is a excellent disinfectant and sanitizer and kill dust mites. When you do your laundry, in the final rinse put 4 to 6 drops to help kill dust mites and any
other harmful
bacteria ( in some hospitals they use 10 drops per load to kill and disinfect harmful bacterias, you can find more information on internet).