TreeD Flexmark 8 issues

I just cannot get this to print… it’s driving me mad. It either oozes out everywhere or won’t come out at all. I’m just unsure if the best settings to make this work. I’m tempted to just scrap the 4 rolls I have & give Z-Flex a try instead.
Any help or advice appreciated, I’ve tried TreeD & they say increase nozzle size but we have had it work before (no longer have the settings stored so starting from fresh) with a standard 0.4mm one.