I am sure there is a name for it but in the windshield, I am starting to see these pinhead size spots that are bright in direct sunlight. I don't recall seeing them before. I am guessing is it some sort of surface pitting or some such thing and wondering if this is generally a result of sun exposure or more likely that I fly out of a giant sandbox of an airport. My plane lives in an open T hangar and lately, I have been flying so much I have gotten lazy about putting the canopy cover on. Is that likely the cause of these little spots or is it more likely something hitting / pitting the "glass" I took a photo of my plane showing what I am talking about. I have 3 or 4 spots now like this that I swear I didn't have 6 months ago. What is the cause? Is there a solution that does not involve replacing the windshield?