Redbean, look at the color. If it is just cloudy or milky it'll probably be ok, but if it looks brownish or yellow toss it. Next see what it smells like cooking. Put some in a stock pot on a burner first and smell the steam. If it smells slightly musty it's probably ok, but if it's a strong soiled laundry smell or off-putting dump it. I would be cautious running it into a pan of good sweet. If your putting it through the pan I'd drain my sweet and have it held back. You can always add it back.

My trees just aren't as good a producers, it seems. I have very few with big crowns and a lot of damaged trees. I would like to see better production, but I make all the syrup I want to make.