hello guys. i got this windscreen problem. there is one time i went to a workshop repairing my back bumper. while they were fixing it, another worker was applying and waxing another car. while he waxing it, the residue from the waxing flew onto my windscreen. its a very tiny dots, like the mist spray. at first i didn't even give a damn about it because i don't know the effect or what so ever and can be cleaned with just using water. after a day, the rain pour down and i turned on the wiper. There is a sandy-sound on the wind screen. after touching it, it felt rough because the wax residue is sticking on it. washing it few times does not get rid of it. i feel so stupid right now.

maybe one of your guys can help me how to get rid of it myself. Thank you.