We hardly ever used this, and kept it maintained meticulously.
We are not smokers and we recently gotten a dog, but she has ridden in it only a handful of times going to the park.
We've always kept the exterior and interior in pristine condition. I love that it is gas so it's not stinky AND the lithium batteries makes for peace and quiet!!
We thought we would go adventuring in this as we always have done in the past in our other campers, but sadly, our sons became teens and now want to do things in town with their friends. Such is life.