Client lives in apartment and does not always have money to wash urine soaked clothing and sheets right away. What can be done to eliminate the urine smell? What else should be done with the soiled items until they can be washed? Other people in the building are complaining about the urine smell in the laundry room too.
The urine smell is just so very gag-worthy. You can try bundling the clothes/bedding in airtight bags and adding some Nature's Miracle (diluted) to the bag and sealing it tightly. Or vinegar. Or baking soda. Then washing the items as soon as possible and rinsing in vinegar and not over drying. Figure out what combination of deodorizing agents work best for you.
The person is not hauling urine soaked clothes to the laundry room to sit, are they? I'd complain too!! They need to be kept in the apartment until washed.
If you can line dry things in the sun, that is helpful.
Sadly, once the smell is totally ingrained in the fabric, you might not ever be able to get it out. The longer it sits, unwashed, the worse it gets.
When I managed apartments, one of our tenants washed her baby's diapers in the common laundry room---I routinely ran a hot/warm cycle with a half gallon of bleach after she was done. This may prove too expensive for your client, but it would be a nice courtesy.