Per advice from RustyPyles CPG and Coreios, I put the pipe in the freezer, then using needlenose pliers I was able to pull the tenon out of the Mortise which allowed me to completely clean out the shank. There was a small white hard cylinder which I presume was the last remnant of the 9mm filter. I was able to reseat the tenon back into the stem and then reinsert it into the mortise sans filter.
Before this process, I was clueless about pipe part components, cleaning, maintenance, etc. Going forward after each monthly use at our neighborhood Beer & Cigar club meetings where I smoke it, I will be cleaning the pipe to keep it in good working order.
Thank you for everyone's help, suggestions, pictures, explanations, etc.