Hey no problems with MHRB but with ACRB i get clear warm yellow naphtha and when i go to freeze precipitate i get a bunch of white floating "stuff" (DMT? lipids? idk) which is always floating on the bottom without sticking at all (whereas MHRB sticks like normal).

Its so floaty im having trouble decanting or using a pipette to pull up the bulk of the naphtha.
Do i need to use a bit of vinegar to get the DMT back out then just keep the naphtha as ACRB defat solvent and basify the vinegar and use fresh solvent to extract and crash out the DMT?

I was having the same issue pulling from MHRB with re-used solvent. What seemed to take care of the issue for me was evaporating the solvent down a little bit & freeze precipitating again.

Same here.

but as long as I always freeze my naphtha in a deeper bowl, the crystals stick to surface on their own while pouring solvent out; so no problem for me.

One more thing that also can be done is pulling naphtha with syringe(20ml+). But deeper bowl is easier option.