A NATURAL WAY TO CLEAN EFFECTIVELY WITHOUT THE HARSH CHEMICALS No goggles and gloves needed…Restore Naturals Toilet Bowl Cleaner uses citric acid to replace the hazardous acids found in most toilet bowl cleaners. Best of all – you can trust our formula to work as well as those others. Made from renewable plant-based cleaning agents this product contains biodegradable ingredients that are grey-water septic and sewer safe and do not create toxic by-products when they degrade.