@Ylva311
Ylva, get rid of the candle, it is statistically proven in my major city of 1.3 million people more house fires result from candles left burning than any other single cause. Second to candles comes lit cigarettes left unattended.
Although you have not brought up any smoking issues, be pro-active! Get yourself a cigarette smoke detector which you can install yourself. It's battery operated, just screw it to the ceiling.
put a sign in your listing that says, cigarette smoke will trigger the alarm and alert you via an app on your phone, and you will find nobody will want to actually put it to the test!
Remove any candles you may have in your listing and that will improve your safety and smoke free environment considerably.
I have a cottage key transmitter which triggers a circuit at the front gate when the guest leaves the cottage.
Once triggered if no movement is detected in the cottage for 8 minutes it trips the heating/cooling circuit and power is turned off and re-activates when the guest returns back through the front gate again.
Lastly, you will find it is hard enough to get guests to adhere to their side of the deal, let alone help you with yours. I also have flowers and plants around my cottage listing but I have never expected a guest to maintain them for me.....and from memory I don't think, in over 400 stays, any guest actually has watered or looked after them.
Ylva, you are going to get the odd breakage but, work out all the ways a guest can abuse what you offer and take the required steps to minimise the risk.
Cheers........Rob