Just got an Ender 3 a week ago. This is my first 3D printer. On the 5th print the object ended up tearing away the surface of the print bed such that it's no longer usable. Trying to work out if this is something that I did wrong or if this is faulty material or a combination of the two?
To set the print head I watched a few tutorials and carefully followed the instructions checking the height with a piece of paper at each corner and in the center and repeated this until it was set.
I watched a couple more tutorials on how to remove the pieces from the bed. I have been removing the top sheet from the print bed by detaching the paper clips. Using the supplied putty knife I've worked around the edges tapping gently with a rubber mallet to get the putty knife under the piece and loosen it before it pops off.
Afterwards I've used the putty knife to scrape off any other residue to make sure that the surface is smooth.
The first 2 prints were with PLA and then the next 3 with PETG. The damage happened when removing a piece printed with PETG.
My specific questions: Is my approach to removing a print incorrect? If so, what would the correct approach be? Did this cause the damage?