Through sheer luck I found a nice use for DG 105. Somehow some glue-like substance got on my windshield. Tried Stoners and 521 but neither worked. For grins I tried a little 105 and it worked like magic removing the goop. Worked so well I applied it on the entire windshield. Have never used a glass polish before but this worked great! Left the glass extremely smooth and crystal clear. Followed up with some Invisible Glass for good measure and voila! Perfect glass.

Give it a shot.