I bought my wife a bissell carpet cleaner had a hand held wand. Or you might be able to rent a carpet cleaner that has a hand held attachment from a store. Mine is ace locally in Hawaii. Not sure elsewhere.
My seafari had a white shag that was mildewed, water logged, and falling off. It pulled right off.
Check this how to out. Not paid or anything. But very helpful on my seafari resto job.
http://www.sailrite.com/How-to-Insta...eadliner-Video