Anyone ever use sperm wash?

Brittany
Having an <a href="https://glowing.com/glow-fertility-program">iui</a> tomorrow , they have me some sperm wash medium to put in with his sperm before I take it to the doctor , so they stay alive for the drive. They told me to take it out to room temperature but that's it ! Do I add it before or after?! What else do I need to do!? Help!