Hi. While I agree that 0.1% DMSO would generally not affect most cells; cells do respond differently to DMSO. Thus I would suggest doing a pre-run where you test various concentrations of DMSO (0.01, 0.05, 0.1, 0.2, 0.5%) on cell viability of your specific cell type and then decide on the concentration to be used. If however, you want to bypass this step, you could try DMSO at a 0.1% final concentration and also run a solvent control in parallel as suggested earlier.