I made a gallon of strawberry wine using strawberry preserves and frozen berries about 8 months ago and it was still hazy and showing no signs of clearing; I assume from the pectin. (I have used jelly in wines and meads before without any problem, but maybe not this much jelly) I pulled a couple of ounces out with a turkey baster, heated it up in the microwave until it was hot but not boiling, and mixed in 1/2 tsp of Sparkoloid. Then I poured it back into the jug. The next day it was clear. I didn't know if it would work or not, but I was shocked that it worked that fast. That was a few days ago, and I will bottle it tomorrow or Saturday.