Braid ALWAYS works if you know how to buy it, store it and use it properly.
Buy it -> chemtronics soder-wick. Do not buy anything else.
Store it -> store it in a zip lock bag not just chucked in your draw or crap box.
Use it -> Use an iron which can actually deliver energy quickly without overheating the workpiece (Metcal!), place the wick at least 1cm in from the end onto the joint and hit it hard from the other side in a iron, wick, joint sandwich until it stops creeping up the wick. Do not stop until it's done or it's game over for that joint.
99% of bad wick and soldering experiences are crap irons, crap solder and crap wick.