I can't even tin it as it turns black befor I reach melting temperature. I tried 6 different tips and result is the same - it turns black and solder doesn't stick, I've no Idea what to do at this point also it smokes when reaches about 350C.
Is it just broken soldering iron and I need to buy a better one or I don't understand something?
I only tried Eutectic Solder, 5 tip were from same source 1 from other. I don't know brands.
Soldering iron is one of those cheep chinese variable temperature ones