I spent a long time cleaning it today ... Had to cut off the silicone as it was glued onto the main stem both by the block and at the bottom. Got everything separated and heated ISO and cleaned extensively... didn't do it ... Had to scrub away with lots of elbow grease and time and got everything clean like new. Finished it with a long boil and a dry in the oven and re-assembled everything. Apart from the slightly scorched timer it's like new So just finished my first 2 bowls .... used the glass stems ... it hits up there with my grasshoppers and EVOs but I did find the draw extremely restricted ... might be something I need to tweak in my method ... My butane torch, an Iroda PT-200 from Canadian Tire, is exactly the right height for hands free heating so that's nice! I didn't time it but it didn't seem to take long to heat ... I'll have to time it next time. First stem I heated to 175 and second to 185 I'm rambling on and am fairly high ... so definitely a slightly different vape signature then what I'm used to.