Applying clear nail polish is often suggested as a DIY solution for preventing jewelry from tarnishing; however, it might not be the most effective approach for long-term results. While clear nail polish creates a barrier between your skin and the metal surface of the jewelry item, it may eventually wear off over time due to regular wear or contact with water/chemicals. Furthermore, nail polish tends to chip and peel off easily if applied on some types of materials commonly used in fake jewelry items like plastic or glass, which could potentially damage the piece. Instead, it's recommended to explore alternative methods such as storing your jewelry properly and minimizing its exposure to moisture, lotions, and perfumes to achieve better results in preventing tarnish.