how to clean waterstains from glass?

[Soma576@xxxx]

List,

I am wondering if anyone has any really good tips for getting rid of stains in my side glass from water deposits (they are irregular stains that cover the whole window as if water droplets dried on it but you can't wipe it off). i've used windex, dish soap, also break-up cleaner. nothing helps. 

any ideas?

Thanks!
Andy