Hi Anne
I was intrigued by Joyce Monks’ comment about unravelling wool to steam and rewind. Acrylic yarn is just as easy to steam and you do it in the microwave!

1) Rewind the yarn onto cones, preferably the wide topped ones.
2) Place cone (s) in shallow microwave proof container and pour hot water round.
3) Cook for about 4 minutes. My microwave is tiny and only 750 degrees, so I’m severely constricted as to height and width. With bigger microwaves you may have to rethink the length of time and power. The important thing is to not let the water dry out. In my opinion, steam never kills acrylic, it’s only the appliance, the (iron or whatever) that does the damage.
4) Remove cones from microwave and allow yarn to dry on the cone. It doesn’t matter if the yarn gets wet, it just takes longer to dry. My photo shows three cones of 4-ply in the microwave which is my limit. Best wishes from Nancy Marchant in Oz.