seconds to get rid of stray naphtha vapors that could give a foul taste to the smoke. When a flame has been produced, it is then moved in circles above the rim of the bowl while the smoker puffs to draw the flame down and light the tobacco. Packing method and humidity can affect how often a pipe must be relit. Burning prevention With care, a briar pipe can last a very long time without burning out. However, due to aggressive (hot) smoking or imperfections in the wood, a hole can be burned in the tobacco chamber of the pipe. There are several methods used to help prevent a wood pipe from burning out. These generally involve coating the chamber with any of a variety of substances, or by gently smoking a new pipe to build up a cake (a mixture of ash, unburned tobacco, oils, sugars, and other residue) on the walls. These coatings may include honey and water; powdered sugar and water; cigar ash and water; and sour cream, buttermilk, and activated charcoal among many others. Many modern briar pipes are pre-treated by the manufacturer to resist burning. If smoked correctly, the cake will build up properly on its own. Another technique is to alternate a half-bowl and a full-bowl the first several times the pipe is used to build an even cake. Burley is often recommended to help a new pipe build cake. The caked layer that helps prevent burning through the bottom or sides of a briar wood pipe may damage other pipes, such as meerschaum or clay. As the cake layer heats up, it expands and may cause cracks or breaks in non-briar pipes. Smoking Pipe smoke, like cigar smoke, is usually not inhaled. It is merely brought into the mouth, pumped around oral and nasal cavities to permit absorption of nicotine toward the brain through the mucous membranes, and released. It is normal to have to relight a pipe periodically. If it is smoked too slowly, this will happen more often. If it is smoked too quickly, it can produce excess moisture causing a gurgling sound in the pipe and an uncomfortable sensation on the tongue (referred to as "pipe tongue", or more commonly, "tongue bite"). A pipe cleaner can be used to dry out the bowl and, wetted with alcohol, the inner channel. The bowl of the pipe can also become uncomfortably hot,