It's frustrating when that stuff happens, and modern boards are harder than the old ones due to increasingly smaller parts.
I've started using a external bottle of rosin flux and carefully painting the smallest of daubs on it where I want my soldier to go right before I apply the iron, it might be in my head, but I feel like it makes a big difference on the cleanliness of the joint.
I/O: My Soldering is Horrible
It's frustrating when that stuff happens, and modern boards are harder than the old ones due to increasingly smaller parts.
I've started using a external bottle of rosin flux and carefully painting the smallest of daubs on it where I want my soldier to go right before I apply the iron, it might be in my head, but I feel like it makes a big difference on the cleanliness of the joint.
This: https://www.aaroncake.net/electronics/solder.htm