South Korean researchers found that washing laundry in hot water, 60 degrees C (140 degrees F) helps get rid of allergy-causing dust mites 100% in comparison to just 6.5% of dust mites when using warm water -- 40 degrees C (104 degrees F).

Washing laundry with hot water also helps loose other allergens like dog dander and pollen. Koreans also have an effective alternative to washing with hot water. They suggest that washing laundry at a lower temperature (between 30-40 degrees C -- 86-104 degrees F) and then rinsing it in cold water twice for three minutes each time may have the same effects as washing with hot water.

Researchers also found that exposure to bacterial "endotoxin" until the age of 3 may help lower children's risk of developing wheezing or eczema. Increased levels of endotoxin are present in homes that are more than 30 years old and have carpeting, a musty smell and interior wall leaks.

The researchers investigated 484 children and found that the lower the amount of endotoxin in their homes, the more likely were the children to suffer from wheezing or eczema by age 3. in the following study, they will look at the relationship between endotoxin levels in the home and chemicals (called cytokines) being produced by certain immune system cells, to see why children exposed to lower levels are developing more allergic symptoms later on.