The holiday season is back and that means it’s time to dust off that ugly holiday sweater from last year’s family or office party. The problem is you haven’t paid much attention to that sweater since last year and it doesn’t pass the smell test once. Don’t worry, we got you covered. Follow this quick guide and you’ll know the ins and outs of how to wash sweaters before the in-laws call you out for the same stain from two Christmases ago. Fill a sink with cold water and add a gentle detergent. Turn your sweater inside out – this is especially important for sweaters with decorations like all our favorite ugly sweaters this time of year – and swish around in the sink. Then let it soak for 30 minutes. Rinse under cool water. Gently squeeze out the water from the sweater. Do not twist or ring out the water – this damages the fabric. Once you’ve squeezed out the majority of the water roll the sweater up in a dry towel to absorb the excess water. Lay flat on a dry towel or drying rack and leave until it is fully dry. How to store sweaters Outside of…