I can't ever seem to get my bike to stop creaking in both the handlebar and seat stem. I was thinking I could put some teflon tape around the contact area on the seat stem. Is that kosher? I took the entire seat stem off today and it looked fine except for some scratches from where the metal scratched a little into the carbon fiber plastic. After doing so it slowed the noise but didn't stop it. Help. The handlebars are a different story.