Our toilet cleaning effervescent tablets contain sodium bicarbonate and citric acid. It can quickly break down stains and restore the cleanliness of the toilet. One piece dissolves quickly and is easy to operate. Continuous action can keep the toilet clean for a long time. The way to use it is simple: open the package, take out the effervescent tablet, and put it in the toilet water. Use a toilet brush to remove stubborn stains. According to the rinsing device, rinse and soak for 30 minutes until completely dissolved. And can be mild and non-irritating, protect the toilet glaze. The formula is mild and suitable for all kinds of toilet materials.