ok what would you guys recommend to clean the interior really good. and what to clean the seats. some idiot i believe spilt water on the passenger seat and let it sit there so theres a stain. not to noticeable but i know its there and i hate it. any help

I have used with good results spot carpet cleaner in the aerosol can on car fabric before.....Simple Green works pretty good too but be sure to rinse it all out as it can ruin the fabric over time I have heard.......not sure how true that is though........