If required, CellVantage^TM Starter Kit enhancers may be diluted immediately prior to use in a solution between 100% and 50% DMSO (v/v in media). This can be done to increase pipettable volume and/or minimize DMSO carryover into cell culture. These intermediate working stocks should be be prepared immediately before use and promptly added into the final application. Freezing or reusing working stock solutions is not recommended.