Striped sweater with lace back

Super cute striped with lace back light weight sweater. Has one small stain on the front that i cannot get out. When i bought it it was on there I thought i could get it out. I didn’t have much luck. Stain is very small. I have worn it 2 and loved it but it is shorter in length than i prefer. I always wash my clothes in cold and line dry them.