I add solder often before 'sucking' out old components. Getting a good flow with fresh solder makes the removal easier. Even when you pull the leg or component and there is some solder remaining, add some new and then suck it clean.

I run my temp at 650. I do chage it occasionally, but not often. I also have a traditional iron and have no clue what temp the iron runs. But experience tells me when I'm too long (hot) or too short (cold). I also find tips important. Small pointy tips for board work and slightly larger for thicker holes. Medium when soldering wires. And so on. The time it takes to heat with the tips also makes a difference.