How to get blood out of sheets<br>Rinse the stain out from behind using cold water as soon as possible. Take the bed sheet off the mattress first, then rinse the stain out using cold water. Do not use hot water, as this will set the stain.

Can we draw the following conclusion?
the stain should be left for a few hours before rinsing

Pick your answer from: I. Yes II. It's impossible to say III. No