To give yourself a little more control, you could turn a mechanical pencil into a simple precision dispenser.
Instructables userMoTinkerGNomedemonstrates that it’s as easy as it sounds in his guide.
Get some 0.5mm solder and a .5mm mechanical pencil and you’re most of the way there.
Give it a few clicks and the pencil will start to push the solder through the end.
This gives you a ton of control and helps prevent kinks and bends in the solder line.
Check out the complete guide at the link below.
0.5mm Precision Solder Pencil… or Got Lead?| Instructables