Sorry if this has been asked, I searched as well as I could: Does anyone have recommendations for "tree sap" removal from my outside vinyl? I just cleaned and protected my vinyl but was unable to get the various tree sap spots off. I used the 303 Multi Surface (and the dollar store "LA Totally Awesome") cleaner but they were no good against caked on goo. If anyone has dealt with this without damaging the vinyl, I'm all ears. TIA.