I just purchased the Monoprice MP Mini Delta 3D Printer and it is my first time using a 3D printer. After initial setup, chose to print the sample from the SD card. Everything started out printing as expected. Approximately 1/3 of the way through the print job, the job went a bit haywire. I don’t know the technical term but it kept printing the filament but it came out as a stringy mess. Where would I start to troubleshoot? Thanks in advance.