On Wed, 15 Apr 2020 13:00:23 -0500, Terry Coombs
wrote:

On 4/15/2020 12:46 PM, wrote:
What about a stream of air to keep it cool ?
No kids.
Outside corner.

* Not enough heat transfer . Build a little "dike" around where you're
drilling the hole with some modeling (children's) clay , keep it full of
water while you drill . Put a wad on the back side too to keep the water
in place as you go thru the tile .
It's a coolant AND a lubricant.