How To Make Good Soldering
Oxidation grease and yes dirt.
How to make good soldering. Apply it with a small and clean brush wherever you want solder to stick. Cut the wire into tiny pieces for a wire and knock out specks for a solder sheet. Make sure the soldering iron has warmed up.
You lack experience in academic writing. Place soldering iron tip on the pad. This is called Tinning which will helps to transfer heat easily.
Cleanliness is imperative for successful soldering because quite simply both the solder and the flux will not flow across dirt of any kind. Tinning will also help to protect the tip and reduce wear. Heat the joint component leads and PCB pads for a brief time solder to the joint ideally from the opposite side to the iron tip.
This should make the tip silvery and somewhat shiny. Place the board so you can access the pads with a soldering iron. Apply solder and soldering iron simultaneously.
The bursh-in-bottle type is perfect. Make sure that the wires to be soldered are perfectly clean. Craft the solder alloy into a solder wire or a solder sheet.
If you want to improve your soldering try to buy a decent quality solder if you can as it is much easier to work with than cheap solder. Cut out pieces and bits in measures that will accurately yield the volume of a solder ball with a 2mm diameter. Dont put solder onto the bit and then carry it.