I have had the MH1C's for about 8 months. While they sound great, I'm a little frustrated by the filters. The sound is continually getting muffled in one ear or the other. I remove and replace the filter and it is all good again. Unfortunately, the fix only lasts for a short while. I don't think it is a moisture issue as I have had them sit for about a month without use and it is still muffled. My hypothesis is that air pressure is causing the filters to get out of alignment when I insert the earphones. Any thoughts on a fix? Should I just toss the filters?
Same problem here, moved to other phones now.