I have been asked a few times about the best way to clean glass pieces. I have personally found that Rubbing Alcohol (90%) along with Coarse Salt (like sea or kosher salt. Pretzel salt for those in the north east) and regular salt. Shake it up continuously for like a minute or so and done, like brand new. Might have to repeat a time or two if you've been lazy and let it get real nasty. Much cheaper than those bottles of cleaner for 10-15 bucks.
