Can I clean the inside of my air conditioner with water?
No, you should never use water to clean the inside of the air conditioner, as water may enter the unit and degrade the insulation, potentially causing electric shock. For the grille and case, use water and mild detergent on the exterior only, avoiding bleach or harsh abrasives. Always turn off the power and unplug the unit before cleaning. (Pages 4, 11)
From the official LG LWG07-Series Window Air Conditioner manual, page 4
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