Okay so I'm just going to have to say this – I beg your forgiveness ahead of time – this is going to be an asinine argument I can already smell it. Personally I clean my classroom because I don't think our janitor staff ever puts any effort in to it. I tried letting them take care of it and a purple stain stayed on the floor for a week before I scraped it up myself. That being said, some districts have a very you do your job I'll do my job. In other words teachers get written up for things that aren't considered their job. It's important to remember that different districts have different rules. Also I think the glassware thing is unfair because for one it's a matter of safety but for two going back to the rules thing it may very well be a legitimate "call the janitor let them handle it don't mess with it" situation.