Get rid of the cats first, then wash your clothing.

Maybe build a "cathouse" (like a doghouse) in your backyard and tell your daughter the cat has been evicted from the garage?

Not much use for cats. Lose the cat and get a dog.

CalHunter, IMO you have the best suggestion. Can't just oust the cat. The relationship is strained as it is. My preference would be to take it to a shelter (well, that isn't my first preference, but I will not say what I probably shouldn't say out loud).

But as for washing the clothes... like wash them 100 times? Somebody suggested washing them with a cup of vinegar first. I don't know why that was suggested.

Try Oxi clean

Old rancid Cat pee smells like ammonia, Vinegar will neutralize some of the smell, But I think it will take more than a cup.

If the vinegar won't work I've used a couple of dishwasher soap tabs in with the wash. Seems to work better than Bleach for killing odors in pet bedding.

I'd be careful what I mix with Ammonia or Urea, plain Vinegar is unlikely to cause any issues, mixing other chemicals, who knows. I do know mixing Ammonia with chlorine makes some nasty stuff. And Urea or Ammonium Nitrate can burn with a boom, especially the crystals in cotton.

I hang my hunting clothes outside under the patio roof in the shade. About the safest place I can think of so they don't pick people or pet odors.