@Darren402 It is impossible to anticipate what a quest will do, but a label right on the kettle may catch their eye. I guess you allow cooking, so why not provide a small sauce pan, and have a label on the kettle that it is for water only. When I get a booking I always ask guests to please read my listing and house rules, and I believe most do, but still, I have had my washer and dryer used, and door to the apartment left unlocked. Two things I do not allow, and mentioned in the listing. Best of luck with the new kettle!