Can’t See hole…
Thanks for the response. The reason I can’t see the hole is because the neck of the bottle is under water. If I pull the drill bit out to clean the core and then re-start the drill before I re-insert the bit into the started hole, the water swirls from the speed of the bit and I can’t see to get the bit back into the hole correctly and it results in the edge of the hole getting badly chipped. That’s why I was asking if you can re-insert the bit into the hole before starting the drill up again.