@Gracy The best bed adhesion is achieved on a cleaned mirror glass. This is due to the even temperature distribution by the thin metal film on the other side.
When leveled correctly by auto-bed level and a 0.2 mm thickness gauge and set at right material temp the adhesion can be high enough to rip chips out of the glass.
Glass mirror tiles go by 1 € per piece. You can cut them with a diamond disk and alcohol cooling with a Dremel type micro hand grinder.
Some adhesive like hairspray will reduce chipping.
On glass you really don't have much adhesion issues if you clean pre print with Ethanol spirit or Isopropanol.