Fuuuck, i need some help

Ok, so as you may or may not (i'm sure most of you don't) know, i don't like smokinhg. I'll do it if i absolutely need to, but I'm a vaporizer kinda guy. So I've had my ubie for awhile and it's been great, never really had a problem with it until now. I just went to take the mouthpiece off and a small piece of the glass from the main part cracked off. The piece that cracked off is usually where i put my finger to hold it anyway, so there's no real problem, but i'd still like to get the chipped piece back on. Does anyone know of anything i could use? Keep in mind it's a relatively small piece of glass that im working with. It doesnt usually get too hot because it's closer to the mouthpiece, but occasionally does so i don't watch to patch it with anything that gives off fumes. I already ruled out scotch/duct tape and any kind of glue. Does anyone have any suggestions? If all else fails i might just use a small small small small piece of scotch tape and make sure that it never gets too hot (shouldn't be a problem because the part i hold the flame under is ~2 1/2" away, plus the flame is held about an inch away from the ubie itself). Any ideas?