I actually have a “resin mixing” gcode file that just raises and lowers the build plate a bunch while I’m warming up the shed my resin machine lives in. That mixes it up really nicely!

As for leaving resin in the vat, thank you for the advice, however I’ve been printing with this machine since 2020 and never empty the vat unless I’m changing resins or using a water washable (which I moved away from as the detail wasn’t as crisp, and it’s just as problematic as regular resin). I do run a clean cycle after a print, peel the sheet up, cure it and toss it. Never had to replace the FEP, never had any leakage issues