How to clean wee out of couch cushion?

DS fell asleep on the couch yesterday (without his nappy on - normally only for nights) and did a huge wee, I tried to clean it with water and a little wool wash for the eucalyptus smell but it still smells like wee

Any tips?
Thanks,

The pee probably soaked into the foam so it will need a good rinse.
I'd strip the cover and leave it out in the rain for a day or two so it gets a good soaking. Perfect weather for it this weekend ;)

ETA sorry I just assumed that it's the type with removable cushions. Ignore me if it's not!

Thanks Raven, definately the weather for it! might give it a go...

I have that book "spotless" and according to that, the best thing to do is to blot up as much as you can with paper towels, then wash the area with a squirt of dish detergent in warm/hot water and either dry in the sun, or if you can't do that then dry the area gently with a hair dryer. I have done this with our couch and my mattress (when DD fell asleep on our bed once and weed) and it works!