original passage: With care, a briar pipe can last a very long time without burning out. However, due to aggressive (hot) smoking, 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.
original sentence: 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.
sentence2: Would a user of a pipe need to pay attention to the cake on the inside of the bowl after the pipe was properly manufactured?
sentence1: With care, a briar pipe can last a very long time without burning out. However, due to aggressive (hot) smoking, 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 wood ash, burnt tobacco, oils, sugars, and other residue) on the walls, which wears gradually and alerts the user to the need for maintenance.