Adjusting the belts should work, but be careful. I bought crappy Autozone belts the first time I replaced them and they burned up the first week and the car overheated.
The stupid belt was way too thick. So we got a mechanic to put new ones on and they still squeal. Make sure you buy OEM belts if your going to do this. Even if they cost a lot more.
The belt spray helps a little bit but as soon as it gets cold it starts again.
I am starting to think the bolt under the car is loose so every time I tighten the belt it just gets loose again.
