<https://olivertraveltrailers.com/forums/topic/2815-need-help-on-cleaning-exterior-window-039band039-amp/#comment-26664>
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"For the white window trim this will work well. \n  \n\nhttps://www.amazon.com/3M-General-Purpose-Adhesive-Cleaner/dp/B00Y957GWC/ref=pd_lpo_vtph_263_tr_t_2?_encoding=UTF8&amp;psc=1&amp;refRID=GBSD3Q9M15NTS3BYYYC0 \n  \n\nBuy it locally at an auto paint supply house and it may be as cheap as $15. This is great cleaner. It gets off tree sap and tar too. \n  \n\nYou can scrub with a small brush (old toothbrush) or even a red Scotchbrite pad, plus the 3M cleaner, if there are stubborn stains. \n  \n\nTreat the vinyl with 303 Protectant or a coat of wax. Or Rejex. \n  \n\nJohn Davies \n  \n\nSpokane WA \n"
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