I tried the cat food can, but I got a smelly burnt can. Do you remove the inner BPA material? I tried putting a foil aluminum tin ( not the cupcake liners) with just a few holes punctured on top and once it got hot, it still burned really hot. Also, I put a lg metal washer on top, so that only a couple of mm hole remained in the middle, but once the metal heated up, the stove reverted to a lg hot flame. All my efforts at simmering seem ineffective once the metal heats up. In fact, it seems to almost make it hotter! I had flames shooting around the sides of my pan and I couldn't put it out in my usual way ( by smothering with an upside down foil tin, or even with a pot lid ).