Bought these at a SGH on a whim before reading about the negatives that go along with Fire. Most difficult lens to clean. You may think its clean, but it'll still have the buffing grease marks from the polishing cloth, even with use of the cleaning kit. This lens came with pitting (or overspray) marks as well upon close inspection through light source, although I think it may be normal for brighter looking lenses to look like this, it was just one more thing that made me realize I didn't need these lenses.