Honda Civic Owners Manual: Fogged Exterior Light Lenses
The inside lenses of exterior lights (headlights, brake lights, etc.) may fog temporarily if you have driven in the rain, or after the vehicle has been run through a car wash.
Dew condensation also may build up inside the lenses when there is a significant enough difference between the ambient and inside-lens temperatures (similar to vehicle windows fogging up in rainy conditions). These conditions are natural processes, not structural design problems in the exterior lights.
Lens design characteristics may result in moisture developing on the lens frame surfaces. This also is not a malfunction. However, if you see large amounts of water accumulation, or large water drops building up inside the lenses, have your vehicle inspected by a dealer.
Maintaining the Bumpers and Other Resin Coated Parts
If you get gasoline, oil, engine coolant, or battery fluid on resin coated
parts, they
may be stained or the coating may peel. Promptly wipe it away using a soft cloth
and
clean water.
...
See also:
Honda Civic Owners Manual. Cleaning the Window
Wipe using a glass cleaner.
Cleaning the Window
Wires are mounted to the inside of the rear window.
Wipe along the same direction as the wires with a
soft cloth so as not to damage them.
Models with Front Sensor Camera
Be careful not to spill fluids, such as water or glass ...
