when you print PLA and have a heated bed you can print on glass.
When the print is finished and the object is cooled down you can just take it (or slide it) of the glass.
I clean the glass with alcohol before I start the print.
Only if you have very large/wide objects you have a risk of warping but you can prevent that by using Pritt glue only on the outter parts.
When you use pritt and can’t get the object off after cooling down (or using it on a cold bed) you can just take the whole bed and put it in some warm water. Wait for a while until the Pritt glue is solved by tge water and you can take off the part.
Thanks Guy for having taken the time to answer. This is super nice of you. I’ll definitely try that and let you know, but you look like a real pro, I have no doubt it will work