Scrubbing Bubbles Extra Power Toilet Bowl Cleaner is our most powerful stain-fighting formula and removes rust and 100% of limescaleIt changes from green to blue as it powers through stainsGreat cleaning power comes with great fragrance optionsThis toilet cleaner has an extended-reach neck that gets 360� coverage under a toilet's rimApply it on the toilet and, after 15 minutes, just scrub the bowl, then flush to rinse