Using StemMACS Small Molecules, I see precipitation when diluting my DMSO-based
stock solution into aqueous medium. How can I avoid this?

Many small molecules have low solubility in aqueous solution. It is common to see precipitation when diluting from a concentrated stock. To avoid this, pre-warm your culture medium, add the DMSO-based solution swiftly, and vortex until the precipitate has dissolved. Make sure that you have a clear solution before passing the supplemented medium through a 0.2 μM filter and adding it to your cell culture.