How should nail polish be stored to prevent deterioration?

Nail polish should be stored in a cool, dark place to prevent deterioration because exposure to heat and light can cause changes in its composition, resulting in thickening, separation, or color fading. Keeping nail polish at a stable, moderate temperature away from direct sunlight helps maintain its consistency and extends its shelf life. High temperatures can accelerate the evaporation of solvents in the polish, leading to a clumpy or unusable product.

Storing nail polish in the refrigerator is not necessary and can sometimes cause issues like condensation when brought back to room temperature. Similarly, placing it near a heat source is detrimental as it increases the risk of deterioration. A cool, dark environment strikes the right balance for preserving the quality and effectiveness of nail polish.