Honda - Accord :: 1991 - Belt Continues To Squeal

I drive a 1991 Honda Accord. A few months ago I began to notice that the engine compartment would squeal when I started it on occasion. I went under the hood and determined that both the alternator and steering pump belts could do to be tightened and did just that. That solved the problem.

A few weeks later they begin to squeal again. I apply some belt conditioner and it usually goes away for that particular trip, but the squeal will come back upon the next time I start the car.

I can't tell which belt the squeal is coming from, as they are practically right on top of one another.

Over the past month or so, the squeal has gotten progressively worse. It will squeal at startup until I begin to reach approx 2k RPMs. If I go to idle during driving, it will (maybe 40% of the time) drop down to below 500 RPMs and squeal, and on even fewer occasions the car will sputter and stall out (MAYBE once per day).

The belts appear to have little give now, but I didn't want to OVER tighten them. They also show no apparent signs of wear or glazing. With the winter weather coming, I'm attempting to resolve this as quickly (and cheaply) as possible, so that I'm not banging around under the hood wearing a parka.