When creating a 1:3 ratio of DMT fumarate and PG, I'm finding that the liquid becomes thick and recrystallizes in the vape cart after about an hour. The cart then needs to be heated to dissolve the DMT and bring the liquid back to the consistency it had when they were first mixed (which was also done using heat out of necessity to force them to mix). A ~1:6/1:7 ratio does not have the same issue and keeps its original consistency indefinitely.
I've read plenty of examples where carts are mixed using a 1:1 ratio or even stronger. This involved freebase though, so I'm wondering if the use of a DMT salt is a factor here. Since DMT Nexus is the only place I'm aware of experimenting with DMT salts in e-juice, hopefully somebody here can provide guidance when it comes to methods of mixing and ideal ratios.