There is an incident in the apartment, what should you do?
Edited
The tenant is responsible for damages that occur in the apartment during their stay. You can, however, assist them in organizing the repair (contacting a tradesperson, references for the damaged item, etc.).
The cost of the repair being charged to them, you may, depending on the situation:
Ask them to pay the service provider directly
Ask them to pay for the replacement of the damaged item
Deduct the corresponding amount from their security deposit at the end of the rental.
Nevertheless, if the issue is a equipment failure caused by aging or if the repair cost exceeds the cost of purchasing a new device, the replacement will be at your expense since we are no longer within the scope of lessee-responsible repairs.