What is used to clean transparent plastic windshields and windows of an aircraft?

• A. Mild soap and a lot of clean water.
• B. Specialized solvent cleaners.
• C. Acetone and water.
• D. Ammonia-based glass cleaner.

Answer: (A)

Cleaning transparent plastic windshields and windows requires a gentle approach to avoid scratching or marring the surface. Mild soap with plenty of clean water used with a soft cloth is the safest and most effective routine method because it removes dirt without exposing the plastic to harsh chemicals that can damage coatings or the material itself.

Specialized solvent cleaners can work for stubborn contamination, but they often contain solvents that can attack acrylic or polycarbonate surfaces. Acetone is a strong solvent that can craze or soften plastics, and ammonia-based cleaners can likewise damage plastic windshields and coatings. So, while those other options might remove grime, they risk damaging the transparency and integrity of the windshield.

In short, mild soap and water is the best general cleaning method for maintaining clarity and protecting the plastic surfaces.