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Otherwise you may find if you ever need to replace the screen protector that it has worn off the coating. I would use a screen protector ONLY if you can get Apple to say it won't damage the screen AND the manufacturer states specifically it won't and has some type of guarantee. I would assume it is not a military hardened AR coating like that used in some double coated sapphire crystals used in high end watches therefore the coating would be vulnerable to wear and tear and scratching. I have no idea what type of AR coating Apple uses but in the past people have worn them off by using various harsh cleaners. So if you use a screen protector on the phone there is no way the protector would ever hurt the coating while on the laptops the adhesive could actually damage the coating. On iPhones the anti-reflective coating is underneath the glass whereas on the MBA and MBP's it is on the outside. Regular cleaning keeps both the physical and internal components in check, ensuring the maximum lifespan of Apple’s line of notebooks.The problem with a screen protector is the adhesive. While Apple makes MacBooks resistant to physical damage with their design, they are still susceptible to dirt through weak internal elements such as wireless chips and dust buildup inside power supplies. Regular maintenance will prevent buildup from occurring in the first place.
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The keyboard should be carefully cleaned with a soft brush, while all ports should be cleaned with sterile cotton swabs. Once you have removed all visible dirt from the terminal, it is time to start cleaning all internal components. This prevents dust, debris and other substances from accumulating inside your MacBook over time. You should also regularly clean the vents on the bottom of the terminal with a dry cloth or compressed air solution. This includes removing stickers and fingerprints from the chassis, as well as dirt from the outside of the machine and the environment. To keep your MacBook clean, you will first need to remove any contamination from the exterior, using specialized cleaning solutions.
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