also … there are 4 screws that can come loose and give you first layer issues. when you remove the nozzle, you will see the heating unit with what looks like a engineering stone that has 3 screws holding it in place … remove these 3 screws and turn the engineering stone to expose the back side … there are 4 screws on the back of the engineering stone … if you are able to snug them up a bit, it means that they came loose and can be why you are having issues
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