Though you don’t have to wear mascara once you have extensions, sometimes you might want to add some extra drama to your look. In that case, avoid waterproof formulas at all cost—experts say they’re much harder to remove and all that tugging is bad news for the life span of your lash extensions. “Avoid waterproof mascara and eyeliner,” Gafni says. “All the rubbing to remove them can also cause you to lose a lash extension.”

Waterproof anything won’t come off with just any old face wash—as the name would imply. It usually takes some oil-based cleanser to remove, and we’ve learned that’s a big no-no when it comes to extensions. Both Feroz and celebrity makeup artist Katie Jane Hughes say that you don’t even need mascara or liner when your lash extensions are in; the extensions offer a similar effect to typical eye-enhancing makeup. “The eyes are so opened with lash extensions, the clients find themselves wearing less makeup,” says Feroz. If you still want to wear a typical eye look, it’s better to go the non-waterproof route so that your eye makeup is easier to remove.