I had my good Singer scissors sharpened at a sewing shop...and after that they were worse than before..took them back..they tried again...even worse...i think you have to know how to do it and this guy certainly didn't...I was told by the store that it was my scissors that were the problem??? they were good scissors..$40 over 35 years ago...i just let it go but I was really upset...it must not be that easy???