Don’t leave food lying around. Take it home or put it in the fridge.
Check if the trash needs to be taken out. Trash cans for both general trash and recyclables are outside the house.
If you move the furniture, please put it back how you found it.
Tidy up, and sweep or vacuum the room(s) you have been using for your event (vacuum cleaner is in the bathroom downstairs).
Clean the toilets, if needed (make sure there is still toilet paper for the next group; toilet paper can be found in the closet in the bathroom downstairs).
Make sure all the windows are closed and all lights / electrical equipment has been turned off before you leave.
Let us know if anything is broken, not working or urgently needs attention (andrymi@riseup.net).