I have the world's largest collection of single beautiful earrings. A pair lasts me about three weeks max. They just fall out. I often see them fly out in front of me as I walk along the street, so can rescue them, but just as often I don't. My lovely birthday earrings are now one earring. I had them a month. Is it just me? I use the horrid plastic backs. They just work their way down and off. What am I doing wrong? (Wails....)