squealing belt

Ok, I finally learned how to find the bolt to tighten the AC belt on our 92 SVX, but the belt still squeals like heck when the car is first started. Is it too tight? Does belt dressing work that is sprayed onto the belt? My wife is getting tired of this thing every time she starts the car and has threatend to cut me off if i don't fix it, and we don't want that!

Please help Mr. Happy from going on bread and water!

thanks

Tdog