<p>I agree that you need to stop doing their chores for them, but don’t put dirty dishes on their beds (even if bagged). It’s an invasion of their personal space and will not help the problem at all. You might need to have a serious conversation (not a lecture) with each individual to just stress how the dirtiness makes the place unpleasant to live in. Be receptive to their points, and hopefully things will get better. </p>
<p>Most college students are somewhat messy, but roomates should be courteous enough to keep it cleanish in common spaces. </p>