This is a horrible idea. Most window cleaners contain some amount of ammonia. Ammonia + Bleach = not good. Very, very dangerous.
Vinegar, patience and elbow grease.
But gassing yourself with chlorine is half the fun in cleaning the house...
I just use Windex on my tanks, even the ones without a hood.
I've heard strong warnings against it, but I just make sure to angle the bottle downwards from the edge. I've been doing it for a year on my four tanks, and I tested the water afterwards for a few months to make sure, never had a problem. I keep bleach away from my tanks, far away...
I handle thick stains with a wetted razorblade though, which probably wouldn't be too good for an acrylic tank. I razorblade the tops of the insides too where it gets left after evaporation.
Very dilute HCl might work too, but it's not something I'd recommend to anyone not familiar with basic chemical safety, and I don't know off the top of my head how it might interact with acrylic... I personally find vinegar too weak to bother with, but I'm not a very patient guy when it comes to cleaning my tanks. I'll spend two hours making a filter look brand new, but I'll be damned if I'm going to spend more than ten minutes scrubbing the glass.