None of my solder joints stick to xt90 connectors

I did not! I’ll try cleaning it!

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Ahah im gonna get crapped on so hard if i show my soldering iron

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This is true for smaller connectors. In my experience the XT90s are big enough that they don’t get deformed very easily.

the factory tend spray machine oil everywhere when manufacturing these. I always dunk all my connectors in a de-greasing solution before soldering to remove any nasty residue from the factory process.

Thanks for sharing this!

Get yourself a smart soldering iron… it will be the best thing you ever give yourself.