After leaving my pipe soaking in Efferdent overnight, I checked on it. It looked exactly the same as the night before. I even tried shaking it in the ziploc. Then, I tried soaking it in the Efferdent in a plastic bowl. No results at all besides a teeny bit clean.

Decided to break down and get All Natural 420 Cleaner. Best decision ever. Cleans even better than alcohol and salt. Don't know how it does it, but it works. Took a few times of shaking it, but barely any resin remains! I'll post an after picture once I get those stubborn parts gone.