DIAGNOSIS That's cosmetic damage from abrasion, likely from using abrasive cleaners, scouring pads, or some dishwasher detergents. It's Tritan plastic, which is tough but can scratch.
FIX The cloudiness and fine scratches are generally just on the surface and don't affect safety or function. To improve clarity, try polishing it with a plastic polish like those made for motorcycle windshields or acrylic aquariums. Apply a small amount to a soft, damp cloth and buff in a circular motion. Rinse extremely well afterward. For future cleaning, use only soft cloths or sponges and non-abrasive cleaners like dish soap.
IF THAT DIDN'T WORK If the cloudiness is from a white, hazy film (mineral deposits from hard water), soak the jar with a solution of white vinegar and water, then scrub gently with a soft brush.
HEADS UP Deep scratches can potentially harbor bacteria, but surface cloudiness is not a safety issue. The primary risk with scratched plastic is that it becomes more brittle over time. Avoid dropping it or subjecting it to extreme temperature shocks (like pouring boiling liquid into a cold jar).