Remove Tree Sap from Vinyl Siding
If drippy trees or deck lumber deposit sap on your vinyl siding, don't delay cleanup. The longer you wait, the more stubborn the sap will become. If you wait too long, you might have to use a pressure washer. If you attack the fresh sap within a week or so, a common kitchen cleaner such as Formula 409 or Fantastik will likely remove the goo. You can also use a biodegradable product such as Simple Green. If standard cleaners won't dissolve the sap, use a citrus cleaner such as Goo Gone ($5 at home centers). Check the label of any product you use to make sure it's recommended for vinyl and test it in an inconspicuous spot for discoloration. Apply the cleaner with a rag or sponge. Scrub tough spots with a soft-bristle brush.