Since we're on the subject of the best soldering techniques, I am getting my hand into fine pitched ICs. I have a few 2560s that I am trying to solder. I have a syringe with solder paste and I used my hot air station. The problem I am having is that no matter what I do, I keep getting solder bridges across the pins. I use very little paste and still get bridges. I use so little solder that it barely solders the pin, but I still get bridges. I have tried not using extra flux and using a ton of it. Using more paste, still get the same result. It seems like the solder just isn't reflowing very well. I have also tried different temps.
Solder paste is from Kester and is 63/37