I absolutely love these. I wish l knew about them a long time ago. My set has lasted twice as long as the suggested lifetime. I am very particular about putting them away in the storage case and also putting the thin plastic paper on the sticky side after every use. This way they don't get dirty because you don't want to ever clean the sticky side because that will wash away the glue. If anything gets on the sticky side l just pull it off or brush it off with my finger nail. I have just bought my second pair. Dont be fooled by other brands