So, don’t feed into the crap of those who say otherwise. Urine is full of bacteria and, if you need a hot water, simply use hot water and not your urine. Urine which has less than 100 000 colonies in 1 ml of urine will be counter as sterile, but there are many bacteria which are not yet measured in the labs and you do have those in the urine.
so, urine is NOT sterile. It has bacteria all over the place.