I've been out in our TM for the last hour just lounging in the front bed, listening to a CD, listening to the rain gently falling on the roof, and anticipating our next trip.
I can't wait!
I took a look around. I noticed a couple of dirty spots, used a scrub-brite pad along with a little Lava soap, and cleaned off what little dirt had accumulated on the inside from our last long camping trip during the summer. If you keep your TM clean and well-maintained, it will look and perform like new for a long, long time.