Electrical transmission towers support wires that carry electricity from power plants to homes. Electric current is electric charge in motion. It can take the form of a sudden discharge of static electricity, such as a lightning bolt or a spark between your finger and a ground light switch plate.
To clean stubborn stains from your toilet bowl, first if you have a wet/dry vacuum, suck out all the water so you have a virtually liquid free bowl. Then, pour in hydrogen peroxide. It will get rid of all stains and lime. I would suggest using 1/2 a bottle for each cleaning. You might need more or less.
Rust and other stains can occur from hard water mineral deposits found especially with the use of well water having high iron content. Staining can also occur from rusty galvanized water pipes leaking into a kitchen sink, rusty toilet components leaking into the back of a toilet bowl or something metal left on the sink. These stains can be difficult to remove.