Review on Soft Scrub Cleaner Duo Cubes Sapphire Cleaning Supplies by John Greene

Yes, we followed the instructions on the box! Luckily we tried it in a frequently used closet in our main house before trying it in a less used second house. Two weeks later it was a two hour disaster with permanent damage to the toilet cistern.1. It left a blue ring which we were able to remove with other cleaners.2. The main problem: when the plastic wrap dissolves, the dice pieces come loose and rust in the tank where they lie. Rust is PERMANENT where parts of this product are located. The damage is irreparable! Before using this product there was no rust in the tank. Do not use. He ruined our toilet tank.