Ya, I hate lead free solder. Sure, there's less lead in ldlnfilas now, but tons more plastic and other substances from discarded electronics. I've seen so may things? fail because of bad solder, especially on BGA chips. There's a reason medical equipment is exempt I also use a flux pen when working with small parts. Helps the new solder to flow when used in tiny amounts that aren't enough for the built-in flux to work.