Cleaning the print bed

  • Sorry if this has been covered before, but I'm new here and didn't see any way to search for a similar post. Lately I've been having adhesion issues with filament that I've used a number of times. Looking at the heated print bed, I see very light remains of previous prints, like a thin layer of old PLA. Is there a recommended way to clean the glass of the print bed? I'm wondering if my new prints aren't adhering because of the old filament remains.
    I don't want to scratch the glass, so scrubbing is out. Heat it way up and let it burn off or melt so that it is easier to remove? Any recommended chemicals? Any help would be appreciated. Ender3 v2.

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