Why do some long-wear lipsticks crack or peel?

Specialist-subreddit threads point to two main culprits: layering too much product, and applying onto un-exfoliated or chapped lips. Both Maybelline SuperStay Matte Ink and Rimmel Provocalips have high-trust Reddit threads showing cracking when these conditions aren't met. Most reviewers recommend a thin single coat over balm-prepped lips, with no over-layering.