The #1 reason your liners are sticking is that the muffins need to cool a bit longer! If they're still fresh out of the oven, they will be extra fragile. If they are completely cool and still sticking to the liner, try this: 1. Place the muffin, upside-down, on a plate. Drape a damp paper towel over the muffin. 2. Microwave for 15-30 seconds, then peel the liner away.