Removing Ivy Residue from UPVC Windows Without Scratching

Dennis moved into a house where previous owner removed ivy from brick and UPVC windows, leaving dead roots on the vinyl. How to remove without scratching the shiny surface?

Methods

1. Herbicide: Spray glyphosate (RoundUp/Brush-B-Gone) several times over weeks (repeat after rain).
2. Organic: Clove oil, or 1:4 vinegar:hot water spray, let set, wipe with smooth cloth.
3. Household: Baby wipes or powder laundry detergent.
4. Specialized UPVC cleaners: Mr. Clean Magic Eraser, GeoCel, Rhino Rub (clean and restore shine).

Key Principle

Avoid abrasives. May take multiple seasons.