is yours a heated bed if not try a hair dryer to warm the build plate if you are having trouble with two color printing you can check out my video on youtube showing some tricks for 3d printing including designing your own models in SketchUp I am just getting started on youtube so if you can subscribe to my channel that would be awesome I will be uploading more videos almost daily thanks in advance

https://youtu.be/TXpJW1RhCA4