Just been in my sons bedroom and removed cups , one had what looked like dry milk in bottom , where hes obviously drunk it but residue left and dried
We had to have a no food upstairs rule As he kept leaving his plates up , would it be unreasonable to have no drinks - or water only
He is normally good at bringing cups down and i didnt notice any yesterday but it appears this one has been behind curtain for about a week
Not even sure of i can get it clean as plastic , currently soaking in hot water and washing up liquid
He moans that i tell him to keep it clean and he says all his friends can eat ans keep their rooms in a mess
I dont expect immaculate but dont think leaving dirty cups is ok as god knows what bacteria could grow etc