I've tried everything and can't get get my bong clean. Rubbing alcohol and salt, boiling water, simple green... After soaking it for hours in alcohol and making no progress I went out and bought some simple green, I left it in the bong for about 12 hours and it did nothing. I got a screw driver and scraped some resin out and it's so compressed that it's rock hard and just breaks off in flakes. The bong is a SYN fixed dome perc, so it's impossible to get into some areas with the screw driver so I can't even scrape out the resin like I did in the downstem. I'm thinking about putting the whole bong in a stock pot and boiling it for a while to see if that will help. Any other advice will be greatly appreciated.