how to clean a tree perc? help needed!

Try adding a little crushed ice to the salt for extra scrubbing action.
I clean my pipe using mineral or olive oil first, because thc is oil soluble, so i figured why not try it. It softens it up and makes it easy to remove, and then you can clear out the oil using soap and water.

I don't know about with the tree perc but moonshine and a bottlebrush for a baby bottle works great for my scientific straight tube

can we see a pic of where it is dirty ? if its in the middle of the piece lay it on its side to soak what ever solvent you use. what i would do is fill it all the way with alcohol (i use Ever Clear $$ ) and leave it for like a day or two.

Indeed foodgrade is best ie moonshine, everclear and the like

fuckin tree percs...
not a fan...
iso shake the fuckin shit out of it and blow iso threw the percs.. if that dont work shake the shit out of it and blow iso threw the percs again.. if that dont work, let soak and re apply in the morning...