Don't use Windex on your MacBook screen.

Microfiber cloth and a tiny bit of water, that’s it.

The anti-reflective coating on MacBook Air screens is surprisingly delicate. Windex, alcohol wipes, paper towels, or any abrasive cleaner will strip it off over time. You’ll end up with splotchy, uneven patches that look worse than the original smudges.

Here’s what works: Dampen a clean microfiber cloth with plain water (distilled is ideal but tap is fine). Wipe gently. Immediately dry with another dry microfiber cloth. That’s it. For stubborn grease, a tiny drop of dish soap in the water works — but only if you rinse with clean water after.

Your screen is not a window.