I don't know about cheap solder - I have done rework on lead-free boards that required an absurd amount of heat - but I love working with Sparkfun's special ble

I don't know about cheap solder - I have done rework on lead-free boards that required an absurd amount of heat - but I love working with Sparkfun's special blend of 96.35% Sn, 3.0% Ag, 0.5% Cu, 0.15% Sb (Antimony): https://www.sparkfun.com/products/10243 https://www.sparkfun.com/products/10243