I have three slices of leftover meatloaf from a local organic ready-made hot prepared food market. Any tips for reheating it and keeping it moist? I had the same situation last month and tried reheating it the next day in the microwave, but it was dry and nearly inedible, even with a smear of ketchup. I have it stored now in a ziploc bag which I didn't before, not sure if that'll help. Thanks.