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Number three is basically the golden rule.

From memory when I ran a production line with soldering stations ventilation is equally (and possibly more) important for lead free solder.

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And do it with enough solder on the iron to get good thermal transfer. "Enough" really isn't a lot but it's also not a tip that's been wiped entirely dry. How you hold the tip relative to the via/component lead matters (because you want the liquid solder to help with the thermal transfer).

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