Speaking of Cold Water
Washing... Just nabbed a box of "Cold Power" detergent. Think will open it soon and give it a try.
Growing up we had a HUGE boxe of the stuff, the sort one would see in a commercial laundry right beside Mother Dear's Whirlpool washing machine. When the box was empty (and that took some doing, as the contents decreased, one had to reach lower and lower to get at what remained), Big Daddy would fetch another, and my brothers made "forts" or found other ways to play with the box.
IIRC, cold water washing really was promoted during the 1970's due to the energy crisis. However try as Lever Bros, Colgate Palmolive, and others tried, housewives simply wouldn't abandon hot or warm water washing in great enough numbers.