Too late, but gently hand washing followed by blocking the sweater to size is the tried and true method, has worked for me a few times.
Had to look up what blocking was, but yeah. I can try that, too.
@Howard started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Too late, but gently hand washing followed by blocking the sweater to size is the tried and true method, has worked for me a few times.