I have a huge dirt line on my Sun-roof cover from being open...

What can I used to clean the headliner...? Just spots here and there are dirty.

 

Meguiar's Carpet cleaner if its a fabric, or vynil cleaner if its not. I just tore my sun-roof headliner out because it was broken, and best of all, gave me much needed headroom. The sunroof is tinted so I am fine

 

I used a bit of oxy-clean on mine to remove some spots last weekend. Worked just fine.

 

You could also try a mild, diluted APC. Woolite + water diluted to about 10-1 works good too.

 

+1 for the Woolite. I dilute mine 4 parts water to 1 part Woolite.

Whatever you so, don't get the headliner too wet. Use as little cleaner as possible.