Help! How best to clean/wipe/de-smell a wee'd-on mattress?!

[Reiltin]

My daughter is day-trained but not night-trained. Last night, like an idiot, I forgot to put her nappy back on after she had a wee so she wet the bed. I'm wondering what the current best practice is in these situations. What do people do to ensure the mattress doesn't get smelly? Any good products I should know about? Thanks 😀