ok - so my wife and i started running over the winter, and everything was great until it started getting hot out. as many of you have stated, the newer iphone/ipod headphones with volume and remote control start to malfunction when they get sweaty. it's maddening to run to and if you're using Nike+, it makes you want to throw your phone 50 yards. i did research and experimentation on this problem over the weekend, and here's what i've found...
the remote/mic "box" is like a long thin rectangle on the right earbud. it has a line running down both long sides of it. if you use a knife, you can gently snap the back of this "box" off (the part with the mic hole, NOT the volume buttons). underneath is a small circuit board held down on 2 (very small) plastic posts. use the very thin part of the knife's blade to lift the circuit board off these posts. next, wipe everything down with a Q-tip soaked in rubbing alcohol (top of the board, underneath, bottom of board, etc.) once it's thoroughly cleaned, re-assemble and give it a try. if that doesn't work (it didn't for me). disassemble again, this time soak the entire assembly in rubbing alcohol for 10 seconds. swish it around as best you can. i used a tiny bowl. let it completely air dry and reassemble. this soaking trick worked for me and i preformed a little victory dance.
the very next thing i did was cut the corner from a sandwich baggie, slipped it over the right earbud, and secured the triangular shape of the baggie about an inch above the mic/remote and secured it with electrical tape. as i wound the baggie and tape, it created a nice cone-shaped cover over the assembly, thus keeping it from getting wet. my baggie protection goes about an inch past the bottom of the assembly.
this morning i tested it during a hot, 3 mile run. all functions worked and i am once again a happy runner. hopefully this helps others who have the same problem.