Soda crystals (not edible) are an all-purpose cleaner: detergent, fabric softener, water softener, glass and dish cleaner, paint and glue remover, tile and patio cleaner. It also cleans greasy surfaces, unclogs drains etc. Soda crystals contain only natural, non-toxic ingredients.Usage: Dissolve in warm water. Do not use on aluminum, oak and chestnut wood. Store in a closed container, protected from heat and humidity.