In ky its 35% front, 25% rear... i have 5% all around on the ranger with a windshield strip and 10% all around on my lincoln.... At night even 10% is diffuclt to backup in dark areas... With both of my vehicles I sometimes have to roll down the windows to see when backing up at night... If you've never had tint - its great in daytime, but night is tricky til you get used to it....

for cleaning, i use a non-alcohol based window cleaner i get from a seller on ebay... its in an areosol can spray - same stuff the tint shop uses...