Old nail polishes thicken and dry out over time, which makes it extremely difficult to use. Here is a trick that may or may not work, but if the nail polish is dead anyways, you might as well take a risk since its doing you no good just sitting there.
What you need:
- Nail polish remover
- Optional: eye dropper
So basically all you do is drop the nail polish remover into the nail polish, one drop at a time, and keep shaking the bottle after each drop. When you feel that the polish is at the desired consistency, don’t add anymore. So simple! You want to be careful though, if you add too much, theres no going back. Generally I think 2-3 drops is enough.
There are things called ‘thinners’ which are designed especially for this purpose. They are probably better, but I don’t really want to buy one, since a new bottle of nail polish is probably cheaper anyways.