The ascending 4th is the most likely perpetrator of technical glitch. Chances are if you are having difficulty with a particular passage, the right hand is crossing up to the next string. Though there are a number of great drills to address the matter, start here: alternating fingers 1 and 2 in the right hand (RH), simply play E A D G D A E A D G D A etc. Duh!! The trick is after working 1-2-1-2-1-2 etc. (RH), reverse to 2-1-2-1-2-1-2-1. Next, incorporate the LH alternating random pitches. Drill to a time reference gaining in tempo. This is merely a starting point. Future drills become quite complicated. Watch for the in the blog, or contact the website.