cheaper in cold water as you don't have to heat up the water. but it is definitely not as effective
Hot water.
Hot water is preferred to cold water when washing clothes because the heat of the water allows the cleaning process to occur quicker. Hot clothing loads make for faster loads and drying times as opposed to cold.
It is recommended to wash white clothes in hot water to help remove stains and bacteria more effectively. Additionally, hot water can help to keep white clothes looking brighter and cleaner.
The supply hoses are hooked up wrong. Hot is on the cold and since it rinses in cold, that means the last water in the tub is hot. Set the tempratue control to cold and start the washer. I bet the water is hot. Move it to hot and it will be cold. Just switch the hoses.
Because hot water melts it so it loses it's grip on the fabric.
Cold water typically does not shrink clothes as much as hot water would. Cold water is gentler on fabrics and helps to prevent excessive shrinking or damage. It is recommended to always check the care label on the garment for specific washing instructions.
Washing dark clothes in cold water is best to prevent fading.
Hot air dries clothes faster than cold air.
Generally, no. Germs are best killed by very warm or hot water.
No, its more energy efficient.
Technically it won't matter as the hot water is made from incoming cold water. However it would be cheaper to turn on the cold water and let it run very slowly, more than a drip. If you leave the hot open, the heater will be turning on and off all night.
Soaking clothes in cold water can help remove blood stains, fresh wine stains, and prevent color bleeding in dark fabrics. It can also be effective for treating delicate fabrics or clothing with dye that may run in hot water.