Hi, I am hoping someone can help me. I have a Mendota D40 running on propane. The batteries in the receiver are constantly needing to be changed, about every 3 months. We don't even use the fireplace very much as it is in a vacation rental which is only occupied on the weekends. Has anyone else seen this problem? Is it a known problem with these receivers? Or do I have a bad receiver? Any help or advice you can offer would be greatly appreciated. Thank you so much.