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I agree with the suggestions of getting your own plates, or sets, that way you can see who is being the slob, and put the dirty dishes in their room. But sit down with your roommates and tell them that its getting gross and this might be an alternative. Or everyone chip in for a maid once a week.
 
Wow people are lazy. Washing dishes, especially simple ones like plates and utensils takes a few minutes. Honestly.

Yeah, most housework is to me not that tough. It's not exactly back-breaking work.
 
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