I had lost some of the airyness (word?) of my Martin Logan speakers. I kept scratching my head wondering if my ears had changed or if there was some equipment problem because the stereo sounded quite dull and lifeless. 'Did a bunch of troubleshooting to the point that it really bothered me and I thought maybe the panels were starting to wear out. Panic starts to set in. After reading many thoughts on cleaning or replacing the panels there seem to be two methods. 1) Vacuum the panels throrougly 2) Remove the panels and literally take a hot shower with them. The panels are very strong but can attract dirt and dust. Believe it or not this is a recommended solution from Martin Logan. It sounded like a last resort. All I did was spend about 5 minutes on each speaker with a fabric attachment. You know...the round attachment with the bristles. You could hear all the dust and particles being sucked up. The air and beautiful highs are back, midrange is smooth and I'm loving life and music again. I thought this might help anybody with logans or other panel speakers. I could see maggies being a little more fickle.