To straighten yarn that has been previously knit/crocheted. A kettle with hot

To straighten yarn that has been previously knit/crocheted. A kettle with hot

To straighten yarn that has been previously knit/crocheted. A kettle with hot water to just below the spout. Pass the yarn through the lid, and up through the spout, slowly pulling it through so the steam unkinks the yarn. For real?? Definitely doing this.