When soldering, you must avoid several critical mistakes to ensure safe, high-quality connections. Never apply solder directly to the hot iron tip instead of the heated metal components, as this burns off the flux prematurely and causes defective cold joints. Do not overheat sensitive electronic microchips or plastic insulation by holding the iron against them for excessive periods. Never move or blow on a cooling solder joint while the metal is solidifying, as minor vibrations cause fractures and grainy, weak connections. Furthermore, never solder without adequate ventilation or eye protection, and avoid touching hot iron tips or molten solder with bare skin under any circumstances.
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