Simplify3D User Forum

So, I am printing a normal cylindrical shape, 50% wall 50% centre hole.
In the slicer the printer looks fine, when I print it prints me some very thin filaments across the whole. I really don't know how to fix this.
I've been trying most of the settings, nothing works.
I've set it with no support, with no fill gaps. nothing works

Anyone have any idea why this is happening?

This sounds like stringing. We have a great Print Quality Guide article that covers this issue so I have included a link to that below:

https://www.simplify3d.com/support/prin ... or-oozing/

If you have more specific questions it would be helpful to post a Factory File so we can give more advice.