Warping is common issue with 3D printers.
I currently work with the Up Plus printer, there are several things to take care of to avoid warping.
There are four things you should pay attention to:
1. close the fan window
2. preheat the heat bed for 15min
3. calibrate the nozzle height
3D Print –> Maintainance
4. limit the air flow around your printer
If you have further hints, please leave a comment.