we're working with 10-15 people in the same room and unfortunately there's no cleaning service. This leads to some untidy places/behaviours, like old cartons lying around, a messy fridge, empty cans standing on each desk etc.
Of course not everyone is fine with that situation, so that it even escalates in some situations. We already tried to have some common office rules. With a connected punishment this lead to even more discussions and escalations. Without a punishment the rules have been just ignored.
Are there some best practices how we can find a good option in the middle and how to motivate the not so clean people to take care, while the other extreme is fine when it's just clean-ish and still not perfect.