UPDATE: After going through all of the suggestions from the forum and other videos, I FINALLY managed to get to the local shop and have them back flush the heater core. There was some yellowish gooey fluid buildup in the hoses and the actual core, but it later cleared. At first the heat amount was not that much better but as I drove it around after picking up, it got warmer and warmer. I think I now have adequate heat in the car. Thanks for everyone's suggestions.

 

If you put it on HI it should burn your ***.

 

Yep, like standing too close to a bonfire!