On Monday, Amy told you how her dog, Matilda, revealed that they were losing a lot of heated air from ducts damaged by a sleepy cat. Sometimes luck (like Matilda's unexpected heroics) or just a little spontaneous detective work can show potential energy savings in surprising places.

What was your surprising energy-saving discovery?

Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. Please comment with your answers, and also feel free to respond to other comments.