I've tried them all Lime Away & CLR are weak demineralizers... not effective on heavily stained toilets, forget any lime/calcium removers for this job. The Works is good, but not as good as Sno Bowl Watkins is on a par with Sno Bowl, its environmentally friendly but costs twice as much Any HCl cleaner is very good, but DO NOT leave it in the bowl very long because it will etch the porcelain Any Phosphoric Acid cleaner is very good, not as strong as HCL but won't damage the bowl. Look for strength of at least 20% (25% is best) Finally, use a pumice stone for rings or tough spots ... View related article.
