Filament is oozing/is stringy

Oozing

Symptoms: 
Extruder is oozing material when not printing
Material strings on finished prints

Preliminary steps:
Make sure you are using balanced settings
Make sure the Purge Tower is turned on. 
Make sure the appropriate extruder is being used with the appropriate material.

Identify which extruder is oozing/stringing.

If Support Extruder:
      If another spool of the identical material is not available, dry the filament
      Navigate to Settings>Advanced>Dry Material. 
      After the filament has dried, make sure the nozzle is absolutely free of all debris.
      Print the calibration test print 
           Insert>Example Files>Method
      Review the test print to verify the stringing issues.
      In order to make sure your calibration print is sufficient, make sure it looks perfect with absolutely no debris.

    If the issue persists:
      Reduce the extruder temperature by 5 degrees
      Print the test print again
      If the issue persists after the temperature reduction:
      Replace the spool of filament with another spool of the same filament
      Print the test print again

    If issue persists after reducing the temperature and replacing the filament spool:
      Replace the extruder. 
      If the issue persists after reducing the temperature, replacing the filament spool and replacing the extruder:
      Contact MakerBot Support

 

If Model Extruder
If printing with Nylon Carbon Fiber or Nylon 12 Carbon Fiber, make sure the filament did not absorb moisture.  The best way to store your filament is to keep it in a mylar bag, in a cool and dry place

Dry the filament, even if it is new. 
Navigate to Settings>Advanced>Dry Material 
Print the Calibration Test Print.
Review the test print to verify the stringing issues.
If the issues persist after drying material, replace the filament spool with another identical filament spool. 
Print the Calibration Test Print again.
Review the test print to verify the stringing issues.
If drying the filament and replacing the filament spool with an identical filament spool doesn’t work
Reduce the extruder temperature by 5 degrees, and try your test print again.
If you continue to experience the issue, run a test print using Tough or PLA if available. 
If the issue is resolved using Tough or PLA filament: the Nylon spool may have absorbed too much moisture. 

If printing with any other material
Other materials do not typically have moisture issues, so the above steps may not resolve the issue.
Open a case with MakerBot Support for further assistance.