Can I use smooth surface clay+QD for windshield cleaning? Or are there any other product(s) from Meg's for this purpose? If it is ok, can you tell me the steps? I just have my two hands to do this works 
Please let me know since I found many water marks on my windshield that can't be removed by washing the windshield.
Thank you

Please let me know since I found many water marks on my windshield that can't be removed by washing the windshield.
Thank you
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