So I've had this piece for about 4 years now (my first and only piece I got when I was 18

) and I didn't clean it for about 2.5 years. (Lol, I know, right?) So I cleaned it about 8 months ago with Formula 420 and it did a decent job, still had resin caught in the bowl area (not in the bowl, but in the space around it). I just cleaned it again last night with warm water and soaked it a few times and cleaned and poked and prodded in between soakings..
Well, my question is what can I do to get that shit outta there? Do I have to soak it in harsher chemicals for a longer period of time, or what? I want to get this baby sparkling, like the day I bought it.
Pictures for reference of where the resin is caught (that tumor shaped thing on the side opposite the carb is a frog, btw

)
