Sansa Clip Dead Dead

My husband has now killed three clips while running. One was my silver clip which I have learned they dont make anymore. Does anyone have a solution to the moisture issue? At least, we bought the replacement insurance from Best Buys on the last one.  Its just a real pain to have to return them.  I have read about the ziploc bag idea but he is not sold on running with it in a bag.  Why doesnt sansa address this issue?