The best way to clean earrings with out tarnishing the metal is by using rubbing alcohol. This will not only clean the earrings, but it also works as a disinfectant. Rubbing alcohol does all this without tarnishing the metal.
You can buy virtually anything online, therefore, you can buy big hoop earrings online. The easiest place to buy big hoop earrings online is perhaps amazon.
Claire's always seems to have a good selection of big hoop costume jewlery. If you prefer to shop from home, Ebay has a large assortment of big hoop earrings ranging in price from a few bucks to...
unless you mean expanders i am not sure what you mean. if you are relating to expanders the best way is to clean both back and front especially with tunnels as i have mine done on both ears. without...