Iwasgoodonce":3qqtnf7p said:Go out and buy a special bit for the tiles. The hardest stage then ifs getting the hole started. Either use gaffer tape or as I did, use an engraving bit in a Dremel to mark the point you want to drill.
Don't use any pressure with either the Dremel, (all you are doing is getting through the glaze), or the drill.
I had a few to do and, once I had perfected the above technique, I didn't break a single one.