I assume you have already washed the whole interior down with some household cleaner (pinesol etc). I would probably spray everything down with Febreze then. It will be in the laundry detergent section at your store. Make sure you spray both sides of cushions etc. You might even leave your cushions sit out in the open for a while. Then fill her up with gas, roll down the windows and get some fresh air blowing through there. Happy camping!