If I put the water after soaking cloth napkins into the washing machine, won't it stain other clothes?

Even if the dirty water gets on other laundry after soaking, you can remove the dirt by running it in the washing machine with the rinse setting set to 2 or more times.

If you are concerned about this, you can remove just the cloth napkins from the soaking water and put them in the washing machine.

To thoroughly remove dirt, we strongly recommend rinsing at least twice when washing.