The trick to using urine for bleaching is allowing it to stand, encouraging the development of ammonia by allowing the urine to react to the air..
| ...In ancient Rome, urine was actually taxed because people considered it to be so valuable, and it was collected from various public locations for sale to laundries. Well through the Tudor era in England, urine was used for bleaching; those stiff white ruffs associated with the Tudors would not have been possible without a bit of urine.
watso was told to just fill the pot with urine - and let it do its magic for period of time
As mentioned, ammonia is a common ingredient in cleaning products. On the pH scale, ammonia is a weak base, meaning it’s more neutral than basic; but it’s also caustic, meaning it has a destructive reaction when it comes in contact with certain substances.
anyway pee is free - and watso will see if it works