What is the best thing to stick them on with?

I stuck mine on with araldite but just dropped off when i brushed it with a sponge the other day :(

supposed to use a rubber grommet mate 18mm i think, dont hold me to it though

I mean to glue the actual plastic plate onto the glass, not to plug the hole in the plastic face

Black Silicon

Clear silicone

I had the same problem. Need somthing that'll hold a little bit better

i use silicone sealer and never had any issues with it.