Household Savings. At the supermarket, a roll of paper towels currently costs up to three dollars each, and costs are escalating dramatically due to skyrocketing deforestation costs and manufacturing and transportation costs caused by energy prices No chemicals required (only some water); Can be used multiple times (clean, wash and clean again); No chemicals required (only some water); Can be used multiple times (clean, wash and clean again); Under normal conditions the NanoCare Towels should last between 2 to 3 years, or 300-400 washes. Wash with warm water and machine dry at low heat No Chemicals At All. The NanoCare Towels are specially designed to give optimum cleaning with nothing but water, and are so easy to use. Simply spray or wipe the area to be cleaned with water, clean with the NanoTowel and buff dry with the dry side (or use another dry NanoTowel). You will then have a clean surface that is truly clean, because it is free of chemical residue