When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I would avoid steaming headliner materials because you'll likely loosen the adhesive that holds the headliner on.
Use a foaming upholstery cleaner and soft brush. This will prevent soaking/ saturating the material with a watery cleaning product and should clean it safely.