solder isn't sticking at all to my iron.
i always tin it when turning it off, not sure maybe i didn't do it properly one time and it oxidized.
i tried dipping it in rosin and applying tin to try to re-tin in like in some youtube videos, but it don't work
i also tried very lightly brushing it with a brass sponge to remove the oxidation layer but nothing seems to help.
why am i having so many issues with this? how do i remove the oxide layer and re-tin it?
(i...
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