Heater heat

Are there any ways to make your car heater run hotter ....I need more heat in the car and even at the max setting....its not making it happen.

I bought a rear defrost unit from a member and I am hoping that helps in the initial warm up but it would be nice if there was a way to up the heat output from under the dash.

I have found heater boxes so packed full of leaves, and dirt, that it partially blocks the airflow. If everything checks out that everybody is,telling you to check, id recomnend taking the heater box apart, to clean it out. Bet theres 40 plus years worth of dirt and leaves in there.