Tree sap on windshield.
 

I have tried everything from windex to using a razor blade but I cannot seems to remove the tree sap from my front windshield. Their was a piece of sap under one of my wiper blades so the first time I turned my wipers on the sap was smeared every where.

lacquer thinner. it gits rid o that stuff right quick! (or it's supposed to...)

yep laquer thinner, or bug and tar remover works great too I use laquer thinner and 00 steel wool about once a year to clean teh windshield really well

dawn dishsoap usually works for me, and if that doesnt cut it i bust out the laquer thinner.