haha true i thought of them just regluing it and falling off again. i think the easiest way is to rip out the old material, remove that yellow sponge thats the culprit to all this, then just glue on a new without the sponge.

it's funny, this world has spacecrafts, cars that park them self, more than a century of building cars, yet the headliners still fall off. hahahah