This may sound a bit strange, but if you live in hard water country (wherever that may be), how about a rinse with dishwasher spot remover. You know, not the dishwasher liquid soap or tablets. But the liquid you pour in the door and then close the cap, the rinse additive? If it works on clear glass in a dishwasher to remove spots, It would work everywhere.
Actually, talking about dishwashers? Do you know if you use automatic dishwasher soap to wash your glass shower stalls, it will remove the calcium and lime spots and leave the glass spotless too? Even with just a normal water rinse.
Next time, instead of washing with a traditional soap, why not get a bucket of water and add a few squirts of automatic dishwashing liquid and the spot remover. I bet it will work!
