There are a few ways to get water spots off car roof lining. One way is to use a hairdryer on the spot. Another way is to use a bucket and pour water onto the spot. Then, use a cloth to dry the spot.
There’s no one-size-fits-all answer to this question, as the amount of water that will stain a headliner will vary depending on the type of headliner and the surface area it is on. However, most water stains will eventually disappear and be gone in a few days or weeks.
Replacing a headliner is typically a very expensive task, and can vary depending on the make and model of the car. Generally, it costs anywhere from $200-$500 to replace a headliner in a standard car.