I got a brand new 3d printer and right extruder was plugged form manufacture. So i removed the brass nozzle after heating to 230 c and used a SINGER SEWING NEEDLE!! yep thats the ticket just take the needle it to the stove heat it up and push it in the nozzle hole mine is .04mm,... make sure to use pliers or something to hold it so u dont get stuck or burnt...Good luck Happy printing!!!!!!!!!!