Best answer as chosen by user Patrickrock: Lemons, Kumquats!

by R. Proffitt Moderator - 7/13/13 9:14 AM

In Reply to: How to remove water mark on windshield by Patrickrock

We have a Kumquat tree and well, here's the article on using lemons.
http://lifehacker.com/5905973/remove-hard-water-stains-with-lemons

Yup, does quite a good job.
Bob