Lulzbot Mini print problem

My Lulzbot Mini v1 stopped printing properly after years of satisfactory use. The line is much too thick. When it begins printing the second layer, the nozzle wallows around in the first layer if it hasn’t dried. It it has dried, the nozzle “skips” over the hard material. I am using the pre-programed parameters for either ABS or PLA+ with no change. I have tried 5 different z-axis settings, a slower print percentage, installed a 0.4mm nozzle(it came with a 0.5mm nozzle), and a lower temperature to no avail. I am printing the octopus file that came with the printer. I can attach either a video or a picture of the beginning of the print. Thanks.