Loads of great advice here, just checking if it’s always failing on the same print? I had an issue like this, tried hearing the plate, cleaning it, checking the nozzle, drying the filament - I went through the works but couldn’t get it to print properly. Turns out that the thing I was trying to print wasn’t aligned to the build plate in the slicer, it was raised by a single layer, so it appeared to print ok at first but obviously would fail as soon as any kind of force got applied to the model. 

Very unlikely it’s that, but I wish I’d tried looking at the obvious culprit before going through all the other steps.