Add the soaked oats to a blender and water and blend at high speed for 1 to 2 minutes (in this step, add the salt and dates if you choose to).
Strain through a canvas fabric, nut milk bag or fine-mesh sieve lined with cheesecloth, squeezing out as much liquid as possible.
Store in a closed bottle for up to 4 days.
Video
Notes
Check your blender's directions; you might need to stop it after 30-60 seconds, rest for a minute or so, and do a second blend to avoid breaking it. Professional blenders can stand for 2 minutes non-stop, but please check.In general, we have found it lasts about two to three days. However, this time may vary depending on whether you sterilize your equipment and how fresh the ingredients you used.