Nothing Tobor. I tried your method, even leaving the bong in the freezer so the melty crushed ice turned rock hard in the diffuser. Then put some hot ass water in the bottom, turned it on it's side so the water was surrounding the whole joint. Nothing... I then filled it up with ice again, let it freeze up good, then hit the outside with a butane torch to expand the outside. Nothing... Then I started to get angry/impatient and gave Moe's way a try! I'm a big guy and I was giving this fucker hell. Nothing... I honestly thought I was gonna break the bong by twisting/pulling so hard. I also tried just heating it up with the torch also, no luck.
There's water stuck between the diffuser and the joint it slides into, thats why it's stuck. Now, I did notice something when I was just heating it up yesterday. The water started to boil when I was hitting it with the butane torch. Maybe i can evaporate off the water stuck in there and eventually free my diffuser? Question beasters x haze: How long can I heat this glass with this torch without damaging the integrity of the joint?