I sell a fair amount of granulated Maple sugar in shaker containers. I recently made some from some early season syrup. It seems like it is a really nice batch, was very easy to sift and has a proper consistency. But, when it sat in the sun on a display table some of the moisture left in the sugar caused some of the finer pieces to get sticky on the sides of the container (near the top @ the airspace). I have never had this happen before. The rest of the sugar from this batch I have in an airtight container for future packaging. I made it on a dry day humidity was @33%, it sifted with no effort and I left it sit on a stainless tray to cool off good while it was spread out. How can I remedy this so this doesn't happen when I package the rest. THANKS FOR YOUR HELP!