Swim has suspected that using tetra first as a solvent wash wasn't doing anything, based upon how slowly the solvent will drain through a coffee filter afterwards.
Swim has noted the same thing. The thing is can't remember how quickly the tetra drained when it was all it took for some pills.
Once the 120s started taking a bad turn they became harder and harder to filter without proper cleaning.
Swim has evaporated mineral spirits soaks along with both xylene and toulene soaks which were 24 to 36 hr. soaks and they always revealed some nasties. So he figured they were getting some of the gakks.
A query slightly off topic, will tetra alone kill povidone?
Ware?