I always make my MMF and I've never had this happen, but for some reason my whole sheet stuck to the table despite the powdered sugar I put down. I was able to scrape most of it off and start over, but now there's a few spots that I didn't get scraped off... Anyone have any tips on how to get this stuff off??

Try getting a cloth/towel wet with really hot water and put it on the stuck MMF. Let it sit for a while to let the MMF soften, and then scrub. Repeat if necessary. It shouldn't be too hard to get it up this way. (At least, that worked for some candy I was making that ran off the foil onto the table.)

It should just "melt" off with a wet washcloth. I also use my benchscraper to the table, but it depends what your table is made of....wouldn't do it to my mom's carved wooden one.

I also recommend using cornstarch instead of ps to prevent sticking.

Hot water will do it. Also, I would use cornstarch instead of p.sugar