A Bissel Green Machine is your best friend. My wife and I bought a 98 Windstar when our kids were 1 and 4. A few simple rules, i.e. no soda, juice or water only and no greasy foods to keep the stickiness to a minimum.
Once or twice a year I would use the Green Machine to clean the interior. When I sold the van in 2006, the interior looked as good as new. At least that’s what the buyer thought.
Ed B.