I put in dryer on low heat or fluff. No wrinkles at all.

If you have the steam feature on your dryer, it worked great on my king sized batting. I steamed it for 15 minutes, then a light dry for 10 minutes. When I took it out it was very nice and unwrinkled.

I buy on the roll also. I cut what I need and spread it out on my dining room table with a vinyl padded tablecloth underneath it. I fill my 400 hole steam iron, hold the iron about 4-6 inches away from the batting, and hit it with a shot of steam. Like magic, the batting puffs up and the wrinkles are removed. I move the iron along the whole piece until wrinkles are gone, never touching the batting with the iron itself. It's fast and produces great results. I leave the batting sit on the table to make sure any moisture is dried from it before I place my quilt top and backing on it.

I usually load my backing and bat the night before I plan to quilt. I'll spray the batting, especially the creases, and roll back and forth. then I lay out the bat and if need be, give it a spray of water and let it lay/hang over the edge. almost always by the time I get ready to quilt the wrinkles are gone. I've not had good luck washing and drying a bat. Have not tried just putting into dryer with wet towel.

If you put it in the dryer spray it with water first so that it damp. That will help the wrinkles come out.

You say it's poly and that's what I use also. Yes, those tend to get wadded around the roll toward the end. When I'm coming to that place on the roll, I unroll it and straighten it out, replace it on the roll and by the time I need the next length it has relaxed.

I just threw mine into a dryer with a damp wash cloth for a few minutes. If it's 100% polyester make sure your dryer is on lowest setting. Often you can just spread polyester batting across a bed, spritz it with warm water, smooth it out and it dries in no time. I did that with some polyester and had ceiling fan on. Worked great.

Ditto................me too

The dryer trick with a damp towel has seen me through every time. All the best as you finish your project.

And, I would not use a very warm heat! A very gentle drying please.