I line them with foil and add flat river rock...... holds perfectly.......
FORCE, you ever tired without the river rock? Just wondering if the temp holds better. I use to use water, but then realized it didn't make much difference in the taste. Most bbq doesn't suffer from a lack of moisture, and I figured out just foiling the pan on both sides and w/ nothing in it seems to hold well too.......
I'm always willing to try something new.