Put tile/plate on solid non-slip base such as wood or concrete plate. Drop water on area where hole is to be made.
Start drilling hole at 75degree-85degree angle to bite into tile to a depth of 1-2 mm (1/16")
Hold drill at a 90 degree angle and swing 5degrees-10degrees to finish drilling. Use very little pressure. Do not push straight down. Make sure water is sufficient to wet bit.