Dishwashing oil, hot water, cold water? Washing clothes, hot water and cold water, from the perspective of scientific knowledge

Tableware should be washed with warm water, because warm water can make oil more easily emulsified and solubilized by surfactants, and it is easier to wash off. The higher the water temperature, the better the washing effect. When the water temperature is lower than 15℃, the detergency of tableware detergent will decrease, so it is best to wash tableware with warm water in cold weather, or increase the dosage of detergent appropriately.

It is best to use warm water of 25-40 degrees for clothes, because washing powder contains enzyme, which is an active substance, so its activity is affected by temperature, and there is an optimal temperature range, generally between 20-50 degrees. As far as washing powder is concerned, cold water can't reach the activity temperature of enzyme, so it is more effective to wash clothes with warm water, but the temperature can't be too high, so as not to destroy the activity of enzyme in washing powder, and hot water is easy to hurt clothes and damage fabric structures such as deformation. Moreover, some chemicals are added in the dyeing process of some fabrics, and high temperature is easy to cause chemical reactions. In addition, when you wash clothes, you should look at the heat-resistant range on the label of your clothes and the instructions on the detergent.