One ply wet tissue paper is extremely hard to cut and this material is used for serious testing. Only a pair of scissors right after sharpening can cut it. If you used the pair for several customers, the pair is not be able to cut wet tissue. But please do not worry. Your pair is good to cut natural hair for many months. Please understand that cutting a wet tissue is only for a test. Long scissors and damaged (by dropping etc.) scissors may not cut wet tissue perfectly.