Another interesting thread.....
I love Sullivan's, secure and spray the backing, add the batting, lay the top on the batting and fold back at intervals to spray the top and even out...had no problems. I use several large tables to accomplish this...
As others have stated here if it truly does not work with polyester batting it's just another reason to add to my list of never using poly batt. But I have to admit I am not in any way a polyester person regardless of what form it comes in...
This method works with my Quilters Dream Cotton, Wool and Orient battings perfectly.
Hoping you find a solution that works for you.