When I heat with the steamer I make a "tube" of tin foil and slide it down the stave to the area I want to heat. Then, twist the open ends closed. I poke a hole in the middle big enough to fit the nozzle of the steamer. I also poke a small hole in each end of my now sealed tube. The hardest part is trying to half squeeze the trigger for a light flow. If you full squeeze it blows the tube apart. The neat part about the tube is it holds the heat much longer. When you have everything all clamped up, just rip open the tube and allow to cool.