Bought a Goldenrod and before any oil was put in, it got an alcohol rinse and the bottom crimp was carefully and neatly resealed with RTV. Many comments about the new ones leaking, so got in front of that issue whilst adhesion was still on the menu.
The tip was not very conducive to getting oil into the ball oilers. A short length of soft clear tubing over the tip fixed that issue nicely. Trimmed clean and square with a razor blade, the tubing pushes and seals around the ball and oil goes into the oiler with little or no mess/wasted oil.
Later the trigger started sticking, so out came the pump assembly and had to fettle the components to mate as they should. With that, my little oiler actually works very well - and continues to.....so far. Just over $10 on Zoro last time I looked.