Can someone help me out with my prints

[brota]

Hello I am new here, I have a new powerspec 3d pro.
I am using the makerbot software and ReplicatorG for creating Gcode.
As an example I have tried making an Iphone case with Raft. With the replicatorg raft it finished pretty good but the raft material will not come off easily.
When I try without the raft I sometimes get some blobs and blobs and strings grab material that is printed and I have to cancel the jobs.
When I use the makerbot software the raft does not lay down well at all and I end up canceling see the attachments.

I think I have the tip pretty well a business card gap.
I have the machine level and the table level with a bubble level.
I am using PLA
220C extruder
60C bed

Would I be better off getting some glass to print on?

Thank you
Brian