Everytime I centrifuge my H6c7 cells, the cells don't pellet properly. Though there is a pellet formed, the supernatant has visible particles which I believe to be the cells. I usually centrifuge at 300 x g for 5 mins. I have tried increasing the centrifugation time to 10mins and also increasing the speed to 500 x g. Despite this, I always lose cells dramatically. Please has anyone had a similar problem with this cell line, or another cell line? If so what method did you try to solve the problem?