The "sweet spot" in lash tweezers refers to the area of the tweezer tips that is best suited for picking up and holding onto lash extensions during the application process. It can vary depending on the shape and design of the tweezers, as well as the preference and technique of the individual lash artist.
Generally, the sweet spot is the point on the tweezer tips where they come together with enough tension to grip the lash extension firmly, but not so much that it causes damage or distortion to the extension. This sweet spot can be different for different types of lash extensions, such as volume or classic lashes, and may also vary based on the size and weight of the extensions being used.
It's important for lash artists to experiment with different tweezers and find the sweet spot that works best for them, as it can greatly affect the speed and precision of the lash application process.