My husband plugged the hole of the toilet with a ball inside of a sock and then poured about a 1/4 - 1/2 gallon of vinegar and fill the toilet bowl up with water from a bucket. Close the lid and let it soak, then use a toilet brush and clean again. You can also soak shower heads in the vinegar mixture to clean out the small holes and use an old toothbrush to clean after soaking. The main key is to let it soak as long as possible and then rinse all things cleaned with vinegar well. Hope this helps you and you find this useful.
When my husband & I clean our aquarium filtration system(not the charcoal bags or foam filter obviously those we spray with outside garden hose), and the glass top of tank and the tubing for the filter system. We use vinegar about a 1/2 gallon. And then let it soak for a few hours. Come back later and wipe lime build up off, use brushes to clean insides of tubes. My husband puts on a cotton glove to wipe the lime off the glass and filter system, so as not to scratch it.
Dave & Kathy, August 2005
