Bought a cardigan from vinted, the seller didn't post a pic of the washing label and I stupidly just assumed it would be machine washable as I have other things from the brand. But..it's one of those dry clean only labels! Any suggestions on how I could wash it at home? I don't like not washing things I get from vinted straight away, wondering if I just put it on a 20 degree wool wash and cross my fingers! It's 55% merino wool 45% cotton.