I have some tree sap on my car windshield that I can't get off. I didn't notice it and hit the wipers and now there's a streak of sap across my window. I've tried some of that tree sap remover gunk ...

Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...