Pla and Petg are fine but as already talked, they are other things to take in consideration. Best thing you can do is to apply a coating of food safe epoxy.

You can use a slicer feature which will pause at some specific layer, if you have a dedicated app on your phone, it will notify you that printer has been paused.

It’s either over extruding or a bed level issue. First level bed again and if it still happening calibrate your extrusion flow. Since you had adhesion issue, probably just bed leveling will solve issue. If bed is well leveled and still have adhesion issue, clean your bed with basic soap and hot water (and avoid touching bed with your hand as much as possible)