3D Printer trick for a Clogged extruder nozzle!

I own the UP! Plus printer version 1.2 and I print in ABS.

I started having issues with my extruder nozzle clogging up, after days of printing.

I think the little guy below is the cause of the problem?

I bought a second extruder nozzle and now I always have one extruder soaking in acetone. That way I never have a interruption in the printing process!