Tried re-washing, didn’t help. Just tried steaming them out. Helped a little. The bottom 1/3 and part of the belly cover won’t cover the horse with these wrinkles. Will wrinkle remover spray remove the wrinkles?
Use an iron with thin towel between the iron and sheet. Will be trial and error to find the right balance of enough heat to relax the crease vs too much heat that will melt the synthetic fibers.
Thank you HugarianHippo. That was my first line of defense. I used steam. It worked worse than the electric hand held steamer, which worked ok, but took forever. I have 6 of these fly sheets. I can’t imagine hand steaming all 6. Then I remembered that wrinkle remover spray. I have no experience with it, though.
I had one that was kind of like lawn furniture webbing, and it warmed up in the dryer for a few minutes, got hung and wrinkles mostly were gone then. So another less hand work idea for you to try.
Have you tried hanging over a fence rail in the sun on a hot day?