Dear Mr. Agung, Warm greetings from Sapphire Sky Hotel & Conference BSD, Thank you for taking the time to share your experience during your stay at Sapphire Sky Hotel BSD. We apologize for any inconvenience you may have experienced. Regarding the water heater, we will ensure its cleanliness. We and our team will always make improvements to make it even better in the future. Once again, thank you and we look forward to welcoming you back to Sapphire Sky Hotel BSD. Warm Regards, Management.