I noticed that the shield became hydrophobic, but it is helpless due to the rain dispersed into very small droplets and still stick on the glass, which make it worse to see through. Want to remove it, but hard I know, because I guess it might be some silane coupling agent reacts with the silicon element in glass and hydroxyl groups on the glass surface. Maybe make it super hydrophobic performed not as good as to make it supper hydrophilic.