The lighter fluid that the parent poster is talking about, Ronsonol, is not the stuff that goes in butane lighters, nor is it the "lighter fluid" used to start charcoal barbecues. He's talking about the stuff that goes into Zippo and similar refillable lighters, stuff that's also called "naphtha".
If you want to use it as a solvent with much frequency, you can get the stuff at dramatically-lower unit prices in much larger containers than what Ronsonol is sold at.
Keep in mind that this is potent stuff and can damage some surfaces. For example, another user is talking about using Goo Gone above to remove adhesive from paint on a wall. Naphtha is more-or-less paint thinner -- your wall's paint will dissolve in it. It'd be fine on glass, what OP is intending it for, but if you use it elsewhere, be careful with it, try it on a small amount of the surface somewhere first to see if it damages it.
It can also cause skin irritation. Probably not a big deal unless you're regularly using it, but worth keeping in mind.
I also have a container of white spirits, which are similar but less volatile.
BaroqueInMind