1. Never Scrub a Toilet Ring Again
Here's the problem with everything you've tried. Bleach... pumice stones... expensive cleaners. They all attack stains after they form. You scrub. It comes back in 3 days. You scrub again.
TrueClean treats your water with every single flush. Minerals get neutralized before they ever bond to your bowl.
No bond. No stain. No scrubbing.