A mascara brush can emerge from the tube with a visible blob at its tip. That blob is unlikely to become a neat coating once it reaches the lashes. Before applying, look at the brush and use the package's intended wiper to remove obvious excess.

Work with a light first coat according to the product's instructions. A second coat is optional, not a task you must complete because the tube promises buildable volume. Check the first result with your eyes open and relaxed. If you like it, stop there.

The timing of another coat matters to the appearance, but different formulas have different directions. Follow those rather than repeatedly combing a product that has already become firm. A brush that catches or drags is a reason to pause, not press closer to the eye.

Do not thin an aging tube

The FDA advises against adding water or saliva to mascara. If the formula has become thick or dry, replacing it is preferable to trying to restore the texture at home. The FDA notes that manufacturers usually recommend replacing mascara two to four months after purchase. Follow the product’s replacement guidance and discard dried-up mascara sooner. Keep track of the purchase date rather than relying on a smell test alone.

If you notice a clump after application, avoid reaching for a pin or another sharp household object. Use only a tool intended for the task, carefully and as directed, or remove the makeup and begin again. A slightly imperfect coating is not worth risking an eye injury.

Keep the wand and cap clean according to the manufacturer's guidance, close the tube after use and do not share it. A makeup bag that repeatedly leaves the cap loose can create a packaging problem that looks like a formula problem.

Before buying the next mascara, think about the brush you found easiest to control. A very large wand may feel quick but awkward at the corners; a smaller one may suit a more deliberate application. Record whether you want separation, a darker appearance or more visible volume. Those preferences can point toward a different product without assuming the one with the most dramatic photograph will be easiest to use.

The useful routine is often short: inspect the brush, apply carefully, look at the result and close the tube. More passes are not automatically an improvement.