Good question. There are two options. First, our local river is only 5-10 minutes walk away. You can take time away from the mission and go wash your clothing on the rocks there at the river. Be aware that morning time is not the best time as it is when many of the local villagers choose to go down and empty their bowels. Also watch out for deadly crocodiles and snakes which are in abundance there.
Or you could take the less lethal option and just wash them here on the mission. We've got a dozen or more washing machines around the place and a few of our guesthouses even have their own. We'll sort you out with a way to wash that involves neither crocodiles or snakes.