Most of my Createx bottles will settle, even the non metalics/ pearls ( i dont use them enough)
Use an old chopstick and get it right in the bottom (the bottom isnt flat) and stir the heck out of it. I actually bought stainless steel chopsticks for this reason. They dont absorb paint and are easy to wipe the excess back into the bottle and clean. yes I have a badger paint mixer but I find the chopstick does the same job without the danger of a new design on my shirt or additional elements on my artwork.