I mixed the Nic, flavors and PG plus about half the VG together. I gave it a good shake let it set a day and gave it another good shake. Added in the rest of the VG a bit at a time, capped it gave it shake and added more VG until the rest of the VG was added. I plan on shaking it every few days as it ages in the Liter bottle for 4 weeks, I think it will be well mixed