washing in the washing machine w/ tide and downey fabric softner DOES NOT WORK !!
Vinegar helps get the smell out of most things, including urine smell out of clothes. Add some to your washing. If it is really bad you can add a 500 ml bottle even.
Cool, let me know. I forgot to mention that you should let it soak for a few hours (depending on how bad the smell is) in the vinegar and then wash it normally.
Im going to try that right now, "THANKS" I'll let you know if it takes the smell out.