My dad had a whole cup of Starbucks coffee spill in the back floor of his car. Apparently the top wasn't on correctly. A couple hours after it happened I jumped on this forum and searched for coffee stains. Some people mentioned Folex so I grabbed some at home depot. I've been using the folex, some hot water in a spray bottle, a brush, and a wet dry vac for awhile now and don't see much improvement. The mat I used a couple products on (folex, shout, hydrogen peroxide, oxyclean), alot of scrubbing, and a pressure washer. It came out okay, you can still see where the stain was on the top right hand side but it will do. But I can't get the stain on the carpet in the car to even lighten. Any ideas? Was thinking of a tannin spot remover but can't find any locally.