Actually I am working on this dog of a commercial panini press. We have been using a couple of the biggest home presses you can buy. They work good, but nothing beats a heavy cast iron press. Presses cost big bucks. I got a very sweet deal on this one only because they never cleaned it. It had a built up carbon layer in the central portion of the press that was all the way to the top of the grooves all around the central area. I used easy off and a butter knife with fine teeth on it to scrape and chisel off the the carbon. Heat is transfered to the iron and the iron transfers heat to the sandwich all the while pressing it flatter. This press weighs about 60#. If the carbon is built up, then it acts like insulation and the heat does not get transfered and heat up the interior of the sandwich. So it called for a major clean up. In 1975 I used to restore antique furniture on fixed quote. Every now and then I would get a tough one that cost extra time (hours). We called those a Dog.