How to safely remove pine-tree pitch drippings from skylight window?

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Skylight window in slanted kitchen ceiling is dotted/streaked with pitch drippings from pine-tree branch outside but hovering over the window. Know the branch needs to be removed to avoid further spotting, but need recommendations for products/solutions to remove current pitch buildup on exterior pane of the double-pane window -- effectively and with no damage to the exterior glass. The self-purported professional window cleaning company technician did not solve the problem earlier this month. Thanks in advance for your help!!
  5 answers
  • Vivian Tinder-Thomas Vivian Tinder-Thomas on Jul 27, 2016
    Try Goo GONE,, rubbing alcohol or WD40.. All 3 are good to remove sap and other sticky stuff
    • AJ AJ on Jul 28, 2016
      Thank You Vivian Tinder-Thomas -- Will dig out my extension ladder and try your suggestions -- thank you very much!
  • Ljgordon Ljgordon on Jul 28, 2016
    Kerosine or paint thinner
    • AJ AJ on Jul 28, 2016
      Thank You Ljgordon -- If none of Vivian Tender Thomas' suggestions solves the problem, will try yours. Multiple thanks for sharing your experience and wisdom!
  • Ann Smith Ann Smith on Jul 29, 2016
    Auto supply store - the stuff to clean bug juice off of grills and chrome.
    • AJ AJ on Jul 29, 2016
      Ann Smith, many thanks for your suggestion! So hot here now in the Mid-Columbia Basin, have not yet launched into this cleanup project but definitely will follow up on your suggestion with local AutoZone store! Thanks again!
  • Don McDonald Don McDonald on Sep 11, 2020

    Worked with this issue for 30 years. If the skylight is glass and doesn’t have any film tint or UV film applied to the outside (It never should but I have seen it). Then go to a janitorial supply company and get a window cleaning razor. This will remove the pine tar. But only use with glass!

    be careful this is extremely sharp. Apply soapy water to the area (dishwasher soap and water mixture) to make the blade slide on the surface. It will take some pressure and to get through the tar. After the main Tar is removed a faint image Is sometimes remaining. Just repeat to remove that. Important not to use the retractable 2 inch razor this isn’t for windows. A good window cleaning razor woul look something like this picture

    • AJ AJ on Sep 13, 2020

      Thank you, Don, for your comprehensive response! I will invest in the tool you suggested, as the pitch drips are a recurring problem.

  • Em Em on Apr 01, 2021

    kerosene cuts pine sap. Even safe for removing from vehicles. Just a dot on a rag and rub on spot. Rinse.

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