Tenant has been running aircon at 16c and for long hours. This caused drain leakage due to icing which resulted in staining of walls.
In this case, is it fair to pass drain unblocking charges to the tenant and ask them to do cleaning of wall stains?
Now, I'm no big city lawyer, but if they were using the AC normally (as in, in a way that wouldn't void warranty), then it's wear and tear, no?