surpintine belt keeps coming off. have a new guard and 5 pullies. on 2000 Chrysler Town & Country

belt keep being thrown off if there is any type of moisture. replaced belt 3 times in 2 1/2 months. when it comes off it tears off ribs. can't depend on it any more HELP!!! I'm handicapped and afraid to go anywhere for fear of getting stuck.

Who has been doing the repairs?
friends and family. cheep labor (lol)
1 more answer , 1 more comment
you may need to change tension arm. possibly change mechanic also. lol. good luck.
The tension pully was replaced.