the flux makes the solder flow exactly to the metal.. its like crazy when you try it… the liquid just goes where its supposed to go like it has a mind or something… if you get the paste, it is like paste till you touch the heat and it turns to liquid… it is like a pathway for the solder and it just flows
https://www.amazon.com/Solder-Wire-Rosin-Paste-Flux/dp/B08BLSJHW1
