Thank you for sharing your feedback. We regret that your experience with the Dyson fan has not met expectations, especially after choosing Dyson over another brand. We understand how disappointing it can be when a product becomes noisier over time despite a clean filter, and when features such as night mode do not deliver the quiet, low-light environment they are designed to provide. If you are open to it, we would be pleased to explore ways to improve your experience, whether through troubleshooting the noise issue, adjusting settings for night mode, or providing you with the best possible resolution. Please contact our chat or voice support team, and we will be ready to assist you. Your satisfaction is important to us, and we remain committed to helping you get the most from your Dyson product. Thank you again for giving us the opportunity to support you.