i just switched from 420 to this and it works great.I cannot stress enough how great Grunge Off is. #1 its a green product. No solvents to ruin your fuming. It's reusable. I don't care how dirty your piece is, soak it in this stuff and then just rinse in hot water and it will look like the day you bought it...no shaking!
Nothing Beats ISO and Table salt...
... ISO is super fast and rinses clean with 0 taste or smell.
heat your glass with hot water + heat your iso alc in the microwave till it boils and use that. heat = much faster cleaning
Take a ziplock baggie, fill 1/2 inch of salt in the bottom, then drop in the bowl.
Cover glass bowl with alcohol, 99%.
Zip up baggie, shake back and forth.
or let bowl soak for 30 minutes, then shake.
Sometimes I cover the hole in bowl with my thumb, fill it will salt and alcohol, cover the other end with a finger and shake.
have fun.
don't forget to use chap stick to grease the glass joints to keep it from sticking too. works great.