Basically, I've noticed a few times a duplicant going by a wash basin and not washing their hands. That can be the case, obviously, if the basin is out of order — but I've seen it happen on other occasions.

Is this maybe a known bug (since the game's still in early access), or are there certain reasons why a duplicant might not wash their hands?

What are all the reasons why a duplicant might go by a basin and not wash their hands?

  • 1
    Just checking the obvious - is the basin set to only wash hands in one direction? Commented Dec 2, 2017 at 21:30
  • Even if it is, they sometimes go by the basin in that direction and still don't wash their hands.
    – JNat
    Commented Dec 4, 2017 at 12:42
  • How busy is the area? I'm not sure if this changed, but when I played two versions ago dupes wouldn't use the basin if someone else had reserved it. Commented Dec 4, 2017 at 14:10
  • 1
    I assume, the Dupes only wash hands which are dirty or infected?
    – PeterCo
    Commented Dec 11, 2017 at 11:51
  • 1
    I'm beginning to notice a pattern that seems to suggest that's the case, yeah, @PeterCo. The purpose of the question is to try to get a list of all the reasons why they might not wash their hands, though, not to try to figure out why my duplicants didn't wash their hands in a particular incident :)
    – JNat
    Commented Dec 11, 2017 at 11:58

3 Answers 3


I know this is a bit of an older thread, but I just had this problem, and I was trying for a while to get my dupe to wash his hands when passing by the wash basin. I tried making it bi-directional, I tried "Move to" several times, and nothing. I was just about to restart the game when I noticed something, the basin tubes on the side - where you can see the blue (clean) and green (dirty) water, they were empty.

Should look like this:

enter image description here

But instead looked like this:

enter image description here

So clicking on the properties of the basin, I looked at the "Contents" and found this:

enter image description here

"Contents None"

I then realized that I had a priority of 5 on the basins, so they hadn't added water to them. I upped it to 9, and immediately someone went and got water, now I see this:

enter image description here

And then my dupe immediately washed his hands as he passed by the basin. It didn't say it needed any materials (much like a research station says it's waiting on water or dirt, or an oxydizer waits on algae) so I didn't realize they were dry.

Hope that helps.


Most likely the cause is that some other dupe is already using the sink/wash-basin. You should put in one sink per every toilet and set them all to be used only on one direction. That should solve your problem.


I found that if the toilet is to the right, and the basin is right next to it to the left, they just ignore the basin completely. So I solved it two ways: one is to put the toilet to the left, and the basin to the right, or to have some space between the two.

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