Dip-It XP features a granular compound specially formulated to remove stubborn stains created by coffee, tea and foods in both hard and soft water conditions. A concentrated formula penetrates soils faster while stable oxygen stain removers make Dip-It XP safe on plastic, china and metal surfaces. Dip-It XP effectively removes rancid coffee oils and tannins which can destroy the “fresh brewed” aroma and can cause off-flavors. Ordinary destainers contain chlorine which can pit and corrode plastic glaze surfaces and increase the staining problem. Dip-It XP is recommended by the makers of melamine plastics.