It's better to wash a car when it's cold rather than hot so that the car won't leave any water spots or soap spots. Hell I've even washed my car when it was raining!! Just make sure you dry off the car once you're done washing it.
But on the very very cold days, I'd just give it a little bit more water all over just to make sure all the soapy feeling is gone. Or you could just use less soap.
But on the very very cold days, I'd just give it a little bit more water all over just to make sure all the soapy feeling is gone. Or you could just use less soap.