Hi Everybody

I am having trouble with my 3D print. The first few layers are fine they look great after a while about 10-25% in to the print the layers start curling. It up looks like hair on the top layer and then the nozzle bums in to it and gets clogged. I will take a few photos and upload them soon with the next try.

I have a Duplicator 4S
Printing in ABS white or black at 220 - 230 degrees. at normal speed.

Any help would be much appreciated.