[Florin_Andrei]

Cheap non-stabilized soldering irons are not for electronics. Use them for rough work such as soldering tin cans - and then get the largest baddest iron you can find. Or just use them as a generic focused source of solid heat - when the heat blow gun is too unfocused.

For electronics, use a soldering station, which is basically an iron that's stabilized and allows you to control the temperature.

Or use a soldering gun, but this is a bit of an acquired skill, and tends to fry sensitive CMOS devices (or anything that doesn't like EM fields and pulses). I still prefer the gun for regular components, but I'm probably old school.