You have only used the bontrager 5 times? In the spirit of being helpful, I also ditched the bontrager on my Gary Fisher (probably the same one you have) and went to a Specialized Indie. The indie probably isnt for everyone but its a LaZboy compared that bontrager and seems perfectly suited to me (on this bike). For $30, its worth experimenting with anyhow.
The bontrager didnt give me any problems until I had put on over 1000 miles. Good luck.