yep, thats it. i believe clockwise makes it get hotter, but mines been set for decades and i cant be sure. try contacting them directly. if you move fast slicing cappings, its near impossible to burn your honey. good luck,mikeI don't know what you mean by "top" of the blade. But there are two sides to the blade. One side has a protuberance. On the other side, directly opposite the protuberance is a very small screw. It's in the blade. Is that a control?