many times when I'm playing a fasting riff (like... 8th notes at 200bpm) and I pull off one string and go to another, the string I'm pulling off from rings an open note, which makes the playing sound really sloppy. Is there any way to fix this problem?
practicing your technique at a slower bpm rate?
start slower and gradually build your speed up
Slow down and perfect your technique before speeding up. Practice clean to hear the nuances of the sound and distorted to hear muting issues.
I have a habit of leaving my index finger on the upper string (if I'm going down) or the pinkie on the lower string (If I'm going up) whenever I switch strings so idk that helps keep my noise down.