When still using my PEEK, I straightened out a section of a coat hanger, heated it up, then plunged it through the clogged area. But stock SD hotend has its flaws.
If you upgrade to an E3D, found Here , it costs $79, is currently in stock, allows you to print more materials than the stock would allow, and is difficult to clog. You seriously have to try to clog the sucker. Since then, I never used a coat hanger.
But if you JUST got your SD4, I recommend clearing the clog then properly calibrating everything. It sucks to be impatient with your new machine, but the results will be night and day. The links wardjr gave should be enough to get you printing properly once said clog is a memory.
Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!