Most household glass cleaners contain ammonia or other harsh chemicals that are toxic to fish, reptiles and invertebrates.
Fritz Glass & Acrylic Cleaner is ammonia free and safe to use on exterior surfaces around an aquarium or terrarium. Unique streak-free and drip-free formulation helps repel dust, fingerprints and water spots.
Also, great for electronics. Glass & Acrylic LCD Screens Silicone & Rubber Reduces Friction When Using Magnetic CleanersFritz Glass Cleaner 236ml / 8oz, Fritz Aquatics