IC gel. i have used a bunch of glue and IC seems to be the strongest, dries the quickest, and always works. forget dollar store glue, it seems to be the same, but its not. IC gel even works on mushrooms for me. just dont put a small dot of glue, but then again dont cover the whole plug with it either. depending on what i am fragging, just a eraser size off a pencil dot of glue, put it in the water and hold it for 5-10 seconds, then place it on my frag rack. good to go!