Using the Qinux Watis portable heater — a few practical questions

Hello, I bought a Qinux Watis portable heater online and have been using it for a couple of weeks. It warms my small living room adequately, but I have some practical questions: Do others have recommendations for the best placement to improve heat distribution? Is there any regular maintenance required beyond dusting the exterior? Any tips to balance comfort and energy use? I’m generally satisfied so far and would appreciate concise user experiences or safety reminders. Thank you.