People in ancient Rome really use urine to wash clothes?

There are strange things about the ancient times is really with a thousand and one nights can not be said, then talk about ancient Rome, the first thing that comes to mind is the Colosseum in ancient Rome, yes, half of the income of ancient Rome are from the Colosseum, although their income is quite a lot, however, this is a strange rumor is that the ancient Romans can not afford to use the water, is to use urine to wash their clothes and do some personal things, however. In my opinion I don't think people in ancient Rome just used urine to wash their clothes for two reasons.

As the saying goes, people rely on clothes and horses rely on saddles, clothes represent the image although not that the image of the requirements of how high, but at least have to be neat, so, whether it is the ancients or the modern people, or very poor people are going to put the clothes to the finishing touches, but the ancient Egyptians will really use urine to wash clothes? The answer is wrong, first of all, according to common sense, the clothes are to be cleaner and cleaner, and is to remove the smell, if they are stupid enough to use urine to wash the clothes, then it would be better not to wash the clothes, because this will be even more clumsy, the more dirty the clothes, and secondly, history does not have such a record, if the use of urine to wash the clothes is really good, then why the traditional habit of using urine to wash the clothes has not been passed down? So, the ancient Romans would not have been so stupid as to use urine to wash their clothes, and these are only passed down from posterity.

Perhaps the people of ancient Rome in terms of living habits and we have a lot of discrepancies, but said that the ancient Romans use urine to wash clothes may not be some exaggeration, so I think that the ancient Romans use urine to wash clothes of this habit is not true, the same, there is no timely records and scientific evidence.