My front loader felts too well! I once put a shawl in on the handwash cycle, cold water thinking it would be safe. I really didn't want to handwash it as one of the cats had barfed all over it. I had heard that front loaders don't felt as they don't agitate the clothes. Wrong! Yup, my shawl came out all felted. Since then I have used it to deliberately felt some things and it works fine.
What brand machine do you have? Mine is a Frigidaire.