I've got a 1997 Coleman Sun Valley PuP. I've owned/used it for 5 years and other people used it for 18 before me. It was not well maintained when I got it, and the covers and foam are most certainly filled with years of dust and stuff. In addition, one of our favorite places to camp is on a private lake next to the water, and there's a dusty dirt road right behind the site. Many times the camper is dust covered inside by the end of the trip. We use sheets, but it still goes thru. I vacuum the beds and cushions, but I know there's still a lot in there. I hesitate to remove the outer coverings and wash them because they never go back on the way they came off after being washed (shrinkage and stuff). What ways have you found to clean/maintain the covers and foam beds and couch cushions? The only thought I have right now is to spray them with Febreze. Are there any enzyme products you've used that sanitizes better and removes the 23 year old dusty stale smell? Thanks!