If you can master the “two-handed” technique you would not have this difficulty. Needle cord in one hand, tweezers in the other hand.
With “progressive epilation” you would actually have a hold of the hair with the tweezers during the same time you zap the hair. With “classic blend” the current is on while you test the hair. Once the hair slides out, you turn off the current: “follicle finished.” In this way, every follicle gets it’s own specific requirement of current, based on it’s size and depth.
In a field of hundreds of hairs, not all follicles require the same current, so “progressive epilation” addresses this issue nicely.
The two-handed technique is not difficult. Actually, I’m not able to do the one-hand technique; two hands is “second nature.”
I always thought 2-hands would be easier for Europeans to master since they use both hands when they eat … unlike Americans that fiddle around: cut the meat, put the knife down, pick up the fork, feed the face … then fiddle all over again. Silly really …
Using two hands would probably increase your speed by at least 30% … lots of time is wasted switching tweezers and needle cord in one hand.