I said OVER TIME, and it will, like I said, ever seen an older bong? One with white film on it that never comes off? If you dont know whats up dont try to post and say someones wrong.
Ide say best to use would be grunge off and some boiling water, unless your smoking oils, those can be harder to remove, but the hot water should handle it.
Dude no it wont, just give it up. I have a science degree in scientific glass blowing. Ive melted more glass down then you have smoked weed. Ive had glass pieces for 6 years and counting and not any scratches on them. The only thing that cuts glass is diamonds and tungsten. So why don't you stop spreading false information around.
Chances are you are scratching your glass cause you use hard chemicals. Have you guys ever heard of glass etch??