I believe DMT oxide is insoluble in
acetone based on work from Brennendes Wasser.
A lot of us don't think DMT oxide is a thing we usually get. Most of the time the colors/oils are just DMT polymorphs (DMT interacting with itself and taking on a different appearance). Calling that DMT oxide is a broad miss-conception I think.
To "reset" the DMT appearance you can do a mini A/B with gentle conditions during the base step (pH not above 12 and no more than 8% ionic strength). If you search the forum you can find successful conversion of oil to xtals this way.
I think some people added Zn during the mini A/B. The Zn does nothing and is not necessary to recover DMT xtals from the DMT polymorph goo. I think there was a miss interpretation that the Zn was reducing DMT oxide to DMT (which it would IF starting with DMT oxide), but in reality the A step was just breaking up the starting DMT polymer (bubbles are not a sign of reaction, they happen when Zn is in an acid I believe).