This will happen. The rate at which it happens, varies from person to person. We cannot seal the lettering because it will dull the bangle as a whole. Bangles tend to last longer but it all varies person to person. Rings can lose letter pretty fast because of their constant contact with your skin, chemicals, etc. Basically whatever you touch, they touch. We do not refund or process returns for worn items that have lost the black lettering. It is a normal part of wear.