I have searched for the video about changing Phonak mic. guards, and can only find one from Crystal Hearing.
My right Naida had become very muffled recently. I have now changed them, with considerably improvement.
The video shows the filters put on the aids separately using your fingers. I placed the sticky strip with the filters straight onto the aid, pressing them down with the removal tool, and carefully peeling off the sticky strip. This leaves the sticky side up, and I wonder if it`s going to pick up dirt easier than that shown in the video.