Hot Heating Properly

Greetings All,
We have a GE DBXR453ET3WW Dryer that is taking 2 shots (approx 60 min each) at getting clothes dry; especially jeans, sweats and other heavy clothes. I have made sure the lint is cleaned out of the traps and also the hose leading to the exterior.
Suggestions for where I should be looking next would be appreciated.
Thanks.