really dont understand why people can clean their clothes every day...
my housemate do the same but she cleaned up by her hand...
this is still acceptable to me because everyone has their way and this does not cost too much water.
however, it is really worry if they don't lock up the door :(
tell them what you think and how you want them to do
if they still do the same, ask them go
if you can give them your reason, i think most of the people can understand.