I'm reminded of an episode from the Avengers where a murder victim was laundered, pressed and placed in a clear cellophane bag. So, naturally all the clues were cleaned up with the victim which made the case difficult to solve. Fortunately the DS characters weren't murdered but I like to think that there was a little army of cleaners, launderers and seam stresses working in the background just to spruce everyone up, giving them their stamp of approval before boarding the device that would take them through time.
