HELP

#1
Hi everyone,
I need some help. I have had my gmax 1.5XT for maybe 5 months. Im so frustrated with this thing. Small prints it does fine but large prints with a large flat surface area give it issues. Some times in the middle area of a print it wont stick the layers together. Other times it wont connect the rows. Leaving small gaps. See pics. I have tried upping my extrusion multiplier and heat. fixed the layer sticking down but not adhering to the row next to the current row. I don't know what to do. I'm really disappointed in this printer so far. I have a couple of A8's that work with 0 trouble.

Thanks in advance