I've got a bunch of oversized tees that I really like, but after a few washes the neckline gets all saggy and loose. It happens whether I hang dry them or use the machine. Is there an actual way to prevent this or fix it once it starts happening?
The best prevention is to wash them inside-out in cold water and lay them flat to dry, since the agitation and weight of wet fabric pulling down while hanging is what stretches the neckline out. If they're already stretched, you can try gently hand-washing the neckline with hot water to shrink the fabric back, then pin or shape it while it dries flat - though honestly it won't fully restore it if the fibers have already given up.
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