This oil is specifically designed for a responsive yoyo.
This oil is intended for all RESPONSIVE yoyo bearings. The smallest amount of dirt can greatly affect the quality of spin and possibly make it not respond or unresponsive. We always recommend taking the bearing out to lube it. Set it on a paper towel and just add a few drops. Let it sit for a few minutes then pat dry while being careful not to absorb the oil around the balls.
The oil containers occasionally leak in the packages during transport so it is not uncommon to open the bag that the lube comes in and find some of the lube has leaked out. There is nothing we can do about this. Please dry the bottle off with a paper towel and store in the upright position.