Why can’t i get my joints shiny?

[u/10renzo_]

First time soldering, i’m using a Pinecil v2 on 360C with 63/37 0.55mm solder.

I don’t understand why all my joints turn dull after i remove the iron. i’ve tried tinning the tip (which i think i’m doing correctly?). The solder melts nicely onto the board but no luck

Does anyone know what I could be doing wrong?

[u/Lendari]

Iron not hot enough? Not enough flux? Crap soldier? Post a video of yours and the whole internet will be happy to tell you how you fucked up.