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From ClarkHoward.com
When it comes to best practices for washing clothes, there are some traditional rules of thumb. According to some recent insight from the experts over at Consumer Reports, however, the rules have changed.
With all the different options for detergents and machines available today, many people have forgotten how water temperature impacts the effectiveness of washing clothes.
Washing in cold water is a much more effective option than it used to be, according to Consumer Reports experts. Traditionally, detergents required higher water temperatures in order for them to be most effective.
That's no longer the case. Detergents are made differently today, in a way that allows them to be more effective at lower temperatures.
Today, "detergents are formulated with enzymes that kick into action even at 60 degrees Fahrenheit," says Pat Slaven, a chemical engineer who has worked as a detergent tester for Consumer Reports for 10 years.
Cold water works just fine
You can wash your clothes on a cold cycle and the detergent will do its job and clean your clothes just fine. The only exception is for people who live in areas where tap water is typically colder -- places like Maine and Alaska, where tap water can run at temperatures of around 40 degrees Fahrenheit. So if you're one of those people, experts says it's better to have a newer machine "that automatically adds some hot water to your cold cycle or your detergent won't dissolve properly."
If you're trying to remove a stain, cold water is still a better option, according to the experts. Once the water temperature reaches above 75 degrees, detergents becomes less effective, and the heat can actually help stains set into the clothing. Hotter water can also damage some fabrics and colors.
When to use hot water
Cold water will clean dirty clothes just fine, but it won't sanitize them. And sanitizing clothes and other items is necessary in certain situations, for example, if someone in your home is sick -- and potentially contagious -- or if you use reusable diapers.
In order to properly sanitize sheets, clothes and items like cloth diapers, you need to use very, very hot water. Even the warm and hot cycle settings on new washers don't use water that's hot enough.
According to Consumer Reports experts, "As long as you're using a decent detergent and a decent machine, almost anything washed in water at 65 degrees Fahrenheit is fine."
