The temperature to wash whites depends on several factors, including the material they are made of, the level and type of stain they have, and the degree of dirtiness. Here are some general guidelines from the search results:

• Hot water: For whites that are typically dirty, such as cloth diapers, use hot water (130°F or above) to remove germs and heavy soil. However, hot water can shrink, fade, and damage some fabrics, so be sure to read the clothing labels before selecting the hot option.

• Warm water: For man-made fibers, knits, and jeans, use warm water (90°F) . Most white clothes can be washed in warm water, which offers good cleaning without significant fading or shrinking.

• Lukewarm water: For delicate whites, use a cool wash (no more than 80ºF (30ºC)) on a delicate or hand-wash cycle. Some fibers will shrink and become weaker in hot water, so the best course of action is to use lukewarm water, ranging between 90 to 110 degrees.

Its important to note that the lower the temperature of the water, the more detergent you need. If the temperature of the water is below 60°F, no soap or detergent performs well. Washing heavily soiled articles with hot water can set stains.