Can you feel them? If so, they're hard water spots and you can use a cleaner polish to remove. Often sprinkler water will do this, especially if water source is from a well.
Or if it's only one spot, maybe etching from bird poop? Bird poop etching is typically repairable by you leaving the car in the hot sun for a couple days. The clear will self heal (so to speak).
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2023 840GC | 2021 740i | 2019 X3
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