[99_XC600]

I can only recommend what I use.

I use Armor All Glass Wipes. These things are absolutely fantastic. They remove all water spots from the glass and leave them perfect.

 

[99_XC600]

I would try BonAmi,car polish(not wax),or ask an auto or home glass installer what they would do/use. The spots DO show in your pic & are ugly. Good luck & let us know if a cure is found. (Other than a hammer!)

I've also used BonAmi. It works very well. Just wash the whole car once your done. The white residue gets everywhere,