Amazon's QU-100 Quicki II 2 Part teak Cleaner 32 oz. Bottle with Brush. Amazon’s Teak Cleaner Developed for the toughest wood cleaning jobs without the harmful dangersof two part Acid cleaners. Won’t stain or harm fiberglass or eat away wood’s soft grain. Part One takes care of the deeper stains, grease and grime while Part Two follows through with surface cleaning and brightening agents. No burning hands with Amazon’s Acid Free teak cleaners. Note: never power wash or use a stiff bristle brush to clean teak as it will remove the woods soft grain leaving a very rough surface sometimes called “raised grain”. Easy to use scrubber pad included. Biodegradable