This will sound nuts but spray a little water on the popcorn and then it should scrape right off it is messy but it was fast to get it down. I found a dust pan in one hand to scrape it into with the other hand using a cheap plastic scraper worked the best, but ours was never sealed and the kids in bunk beds would run fingers and toes and what all across the ceiling cause it was right there....popcorn had to go