Scratchy piping

Hello there! This is quite random but I don't know of any other forum that could give me some advice. I made a blouse for myself and wanted to add piping on the neckline for detailing. The blouse is unlined. After a bit of searching around I decided to use the piping as the neck facing -http://www.blogforbettersewing.com/2014/02/tutorial-using-piping-as-facing.html It sounded brilliant. I went ahead and finished the entire blouse. Now the issue is that I used store bought piping and applied as facing , it is really scratchy. Is there some solution I could use?