Friend of mine had same problem with the single matrix. Eventually it just came lose. Was stuck in his for a few months too. Not sure if you tried, but when I clean my perc pieces. After putting in the iso, I will blow into the stem (where the bowl is) to make the perc bubble.
**RESURECTION** HF acid unique in that its eats the calcium in your bones, VERY NASTY SHIT. Youll know if you mishandled it by a dull bone ache that turns into a hospital visit. Seriously though, you probably meant Hydrocloric acid. FWIW,I have the small herb friend thats been in my bubbler for a few days now as well. Gonna wait him out.
If you can't figure out how to get a piece of ganja from your piece, you're doing it wrong....even years later....
hey dude u should figure out what was that mr white used in breaking bad to melt people, or figure out some other strong acid that does not reacts with borosilicate glass.