W = Wet/water cleaning only. You could clean these with quite a few techniques: diluted dish cleaning soap and a rag, upholstery cleaner or upholstery cleaning devices. The caliber of the finished product might be as low as .five parts for each million. The main benefit of counter-current deionization would https://viewyournexthome.com/essential-tools-for-efficient-window-cleaning-a-comprehensive-guide/