Fridge and Freezer not cooling enough

I have a GE PFSS9PKYASS French door fridge with the freezer on the bottom and both freezer and fridge are not maintaining a cold temperature. I took off the panel in the back and cleaned the compressor coil with a brush and vacuum. I also accessed the condenser coil in the freezer compartment and there was no build up of ice. I’m currently at 39 degrees on the freezer and 68 on the fridge. Any idea what the prob could be?