A couple of notes on technique if this is new to you:
- Blot so you do not damage the texture of the headliner
- After blotting the spot a couple of times, move to a fresh section of cloth with fresh cleaner, otherwise, you run the risk of re-depositng the dirt as you blot
- With the light headliner, often you will end up with the freshly cleaned spot being cleaner than the surrounding area. To address that, lightly moisten a fresh section of cloth and blend the clean spot into the rest of the headliner
- Never spray cleaner directly on the headliner--you will end up with a ring