[benz rider]

As a big fan of Ajax, try this:

take a squirt of Ajax and soak the towel in water and clean your windows real good then rinse away the hard water spots, dirt and contaminants.. then apply some rain-x. like new again. crystal clear and protected.

only problem with rain x is this. if you have it applied already and you for some reason need use your window washer. the washer fluid mixed with the rain x can make it hard to see on rainy days.

so the key is not to apply a lot of rain x, a little goes a long way. try applying it with a sponge and NEVER use a paper towel to apply it. way too much dust particles in the paper towels and will not spread evenly over the window forcing you to use too much.