Smell of urine-what's the best laundry detergent for this? Have an elderly mother.? ...
Answers: What works best is buying some odor remover in the pet slot of the super market. Make sure it contains "enzymes". These enzymes break down the ammonia compounds that are cause the smell. It's about $10, but okay worth it.
Use a tablespoon of bicarbonate of soda along with your regular detergent. It get the smell right out. It may be called something different within the US though, sorry but I don't know if it is.