Garmin has provided Service Advisory 2051 for general recommendations, materials, and supplies to clean and disinfect Garmin products. Otherwise, not following the recommendations could void the warranty.
Cleaners containing ammonia will harm the anti-reflective coating on many Garmin aviation display lenses.
Disinfectant with a solution of 70% isopropyl alcohol that does not contain ammonia is preferred. Solutions of up to 91% isopropyl alcohol are also acceptable.
Clean the display lens using a clean lint-free cloth and a cleaner that is specified as safe for anti-reflective coatings.
For other exposed surfaces such as knobs, buttons, and bezels, a damp cloth with soap and water is acceptable.
Bleach-based cleaners, ammonia-based cleaners, or other harsh chemicals on any surface are not recommended.
Remove all soap/soap residue to prevent buttons and knobs from gumming up or becoming slippery.
Many aviation products are not rated as waterproof. Spraying or wetting the units to the extent where moisture could go beyond the exterior surfaces could damage the unit.