Sofa cover should be dismantled and cleaned once a week. When the water temperature is above 60℃, it is best to let sofa cover soak for 10 minute, which can kill dust mites. Note, however, that cold water immersion has no effect on mites, and cold water can only be washed away but not kill mites.
Put the cleaned sofa cover in a plastic bag, flatten it and put it in the freezer of the refrigerator. Wait an hour before taking it out to dry normally.
Not only high temperature, cold and freezing can kill mites. Although dust mites can survive at 0 ~ 7℃, they have no reproductive ability. Dust mites cannot survive in the environment below 0℃. So we need to put the washed sofa cover in the refrigerator.
If there are mites on the sofa, you can immediately spray dust mites, then put a quilt cover on the sofa to remove mites, and tighten the zipper of the quilt cover, so that even if mites breed, it is difficult for mites to contact people through the quilt cover; In addition, mites from outside can't enter the quilt cover to breed.
Move the sofa to the sun to dry regularly. If it is inconvenient to move out, always open the doors and windows to keep the room ventilated. In rainy days, you can turn on the air conditioner to adjust the indoor temperature and humidity, so as to prevent the sofa from being wet and give mites an opportunity.