Everyone puts a shirt in the dryer sometimes that isn't supposed to go in there. We have the solution for you!
Fill a sink with warm water and add baby shampoo in the mix. ( or hair conditionner 1/3 cup). Let the piece of clothing in the water for 10 minutes. After , remove the excess water.
Place a towel on a flat service and roll the piece of clothing in there to absorb more water. After, place the sweater on a dry towel to gently stretch the t-shirt or sweater.