What have all of you used to clean the cloth interior, such at the roof and side pillars? When I got my springs installed, the guy got grease on the interior and I have no idea how to clean it without spreading it around.

 

I've used diluted PoorBoy's APC (All Purpose Cleaner). I recommend whatever you use that you dilute it first as a test.

 

where can you get that? does it leave a darkish stain on the cloth?

 

Just to add to the tip jar here - if you ever get ballpoint pen on your headliner use a light dab of isopropyl alcohol and it will leach the ink right out.

I have first hand experience.

 

I've used this product a couple of times on the fabric covering the trim on the inside of the A-pillars, and the results were excellent. Both times I was trying to get rid of fingerprints.**
http://www.k2rbrands.com/products/original.htm
You just spray it on, wait about 15 minutes for it to dry to a white powder, then brush and/or vacuum to remove the powder. It may lighten the fabric very, very slightly, but it's so slight that it doesn't bother me -- an ultra-picky person -- at all.
I recommend using some pieces of paper and masking tape to mask off the area surrounding the trouble zone; then you won't have to do any cleanup beyond removing the powder from the dirty spot.

**The first time, a mechanic at my local Acura dealer must've put a hand on the inside of the driver-side pillar. The second time, the nitwit mechanic who was putting a new inspection sticker on the inside of my windshield -- bottom corner on the passenger side -- must've put a filthy hand on the inside of the passenger-side pillar a bunch of times, because there were a good dozen prints on it.

 

For dry stains get one of those wonder eraser sponges. They work dry. Took off the hand print from the mechs when they used their dirty hands to push the car.

For wet stains like grease, you need a cleaner.