DD (3yo) doesn't normally have daytime naps & is still in a pull-up at night, so have been lax about getting waterproof liner for bed 
Yesterday, she bucked the trend & took herself off for a nap, during which she had a huge wee that soaked right through the mattress 
Am posting to check I'm not the only numpty this has happened to garner any advice I can regarding cleaning it, or are we facing a new mattress (gahhh!). Hubbie wiped if over with washing powder solution but had to put back on bed tonight as no other option for her.
Thanks in advance x