I had SH-SY-5Y cell line that was contaminated however I managed to decontaminate it using antibiotic and it worked and ended up having a good stock of the cell line with high proliferation and viability however when I tried to seed 7500 cells per well in a 96 well plate after 24 hours cells started to settle and take the morphology but once I started treatment with a drug when the media was aspired and new media with drug was added cells started to detach from the well forming batches, I tried different cell counts with different confluency and from different passages but the problem was still there