Why does masking tape go bad?

Masking tape can go bad due to degradation of its adhesive and backing materials over time. Exposure to heat, humidity, and light can cause the adhesive to dry out, lose its stickiness, or become overly tacky, making it difficult to use. Additionally, the tape may become brittle or lose its flexibility, resulting in poor application and performance. Proper storage in a cool, dry place can help extend its lifespan.