How to clean a headliner?

[Scrmegl]

Steam could likely loosen the spray adhesive and cause stretch/sags. If done very careful over a cloth to transfer it might work. Just don't work or scrub. Spray/blot works ok. I've used an extractor before with only partial vac and slight rinse after a spot treatment (first wet wider than spot spray area to avoid clean ring lines and work outside in on stains).