I got a spool of Worthington 97/3 Rosin Core solder and have been using it for a long time. I've always had problems getting solder to stick. I just assumed my technique was bad. (to be fair, it probably kind of is) I recently built a project from a kit that came with a small roll of solder and it worked beautifully. I've never had a board look so good. My question is, what kind of solder do you guys use? Also, is there a reason the stuff I was using before refuses to cooperate so often?

I'm a sucker for novelty. A vape stomp box? Brilliant!

It's still wet and I'm waiting for it to completely dry. The 2nd pic is just dipped in warm water then applied onto enclosure. If you look closely, you can see the wonky black line to the left. PS, I don't sand my enclosures except for those that have deep scratches.
