Default Screen protector problem

Hello! So i've bought a new screen protector and went to a proffesional to apply it. All good but i notice that after a few days this weird thing, some parts of the protector became whiter, as in white spots and lines and i can' t get rid of them by wiping no matter how hard i try. Now this protector has an anti glare coating and the guy said that it will worn off in time. So i'm really puzzled about this, what do you guys think?

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