I made sure it has the proper amount of give or slack.
But yeah, it always starts squealing in the rain after a while, and something messed up is that the last two times these suckers popped off was when it was raining, wtf is right... after a year, I'd almost expect to hear them squeal again, but once every two or three months, and the last time it was only a week or two in between belt changes, not acceptable.