It looks great so far, but I would like to add some suggestions.

Could you please make the whole process a bit more demanding? Right now it is just too easy to mass-remove the debuff from everything in no time.
Things that would help:
-add some kind of detergent you have to produce in the chemlab which can be used to "fuel" the machine for a few usages
-make the washing process take longer, it could be easily 300% or more of what it is right now
-add a specific research so that you have to invest some time before you can unlock this feature which will make your life a lot easier
When you want to keep the basic version, maybe you can add these features in an advanced version?
Also it would be nice if it would be possible to rotate the washing machine.