Settling into a hotel room or Airbnb after a long day of travel often means plugging in your phone before going to bed.

Do you get the feeling your hotel room or rental wasn't actually cleaned? These are the dirtiest spots you need to look out for.

Airbnb is often regarded as the poster child ... which has a large exposure to the more penetrated traditional hotel room segment, to grow slower. Digging below the surface, (using data on ...