SWIM has done a modified Norman STB tek with Mimosa and Heptane. The last extraction stood with heptane +mimosa slurry for about 4 days in a 20 degree (Celsius) cellar. When SWIM was going to separe the heptane he saw that it was already filled with crystals. As the crystals are solid they float in the interception between heptane and slurry making it impossible to separate the dmt from the slurry. I guess this is due to SWIM waited for long so the solvent evaporated in the bucket resulting in crystals before separation.

What can SWIM do now? Is there any way to dissolve the crystals again, SWIM is thinking of moderate heating and adding extra heptane?

separate the solvent as much as you can and freeze it (you can leave the crystals as they are), then add more solvent to the mix for more pulls, which will dissolve the crystals floating between layers