So I've already had one die, and the other one's resistance keeps creeping up to 5.0. I clean them, and then they last for about 20 min, and then the same thing happens. These are 4 week old attys (and I've already bought more) but I was wondering if something else is causing them to keep doing this. Is it age? My liquids haven't changed. I've never had this problem with my 402 attys. They lasted 5 months.