Dear all,
I have a problem in culture of HDFs. Every time I seed them, they detach from the surface of the flask, or even they don't adhere at all. Consequently, precipitation occur without any change in color of the medium, even after a week. I tested everything and used other companies for medium (DMEM), serum (FBS), and the flask (poly L_Lysine coated), but the same result achieved. the PH of the medium was 7.9. It's virtually high but not as much as to bring about detachment of the cells. I've cultured any other cell lines but I'd never experienced this problem. What's your advice?