Since brass is a natural alloy, it will gradually loose luster over time with exposure to oxygen and moisture. If you prefer a bright sheen, this effect can be achieved with a quick polish.
To clean using ingredients you may already have at home, use Vinegar, Salt and Flour to make a cleaning paste. Dissolve 1 teaspoon of salt into one-half cup of vinegar, and add flour until the mixture becomes a paste. Rub onto the brass, leave for about 10 minutes, then rinse with warm water and buff dry.
To prolong the life of your jewelry
Remove jewelry before participating in physical activity or going to bed.
Store it away from natural sunlight and heat.
Avoid contact with water, lotion and perfume.