A Cartesian Analysis of My Sticky Below Window Area.

A question from myself and my father in law:

Facts

1. My car, 7 years ago, had company decals on both front doors.
2. Just over a month ago I tried taking them off. 
3. The first one came off a breeze, in one go. I think I even have it in my shed. A decal intacticus.
4. The second one, I tried to take off right afterwards.
   1. It was a disaster.
      1. It would not come off except in tiny bits.
         1. Even after trying:
            1. WD40
            2. Furniture polish
            3. Elbow grease
5. The second, the passengers side decal, remains in a state that can only be described as a disappointing attachment.

1. Questions about the above state of affairs:
1. How is it possible that two identical decals can have two radically different dis-adhesions?

Our speculations and deductions:

• The Cause Of Difference must must occur in time.
• The COD can be:
  • Formative
    • When decal P was made, decal D was made differently with regard to its adhesion.
  • Applicative:
    • Decal P was applied differently to decal D:
      • Perhaps the technician had a cup of tea before the driver's side, and after the passenger side, and this delay changed the properties of the glue.
  • Instantiative:
    • The COD is caused by change in the instances after application.
    • These changes can be:
      • Environmental:
      • Perhaps one side gets more weathering from wind or sun.
      • Internal:
      • Perhaps one side gets more heat from the engine than the other.
  • The domain of the COD is most probably to do with heat.
    • As opposed to:
      • Electrical
      • Aerodynamic
      • Gosh, what else?

Answers on an e-postcard please....