What would happen if you did this?

If you slid the probe into the hair follicle and applied the current, but didn’t take the hair out? Would the Follicle till be weakened/destroyed? Or is it a must to take the hair out for the treatment o be effective?

We lift the hair out because the body would / may detect it as a foreign body after it was treated and do all the good stuff necessary to attack it, leaving you with more inflammation. Also, it is great for you to see the hair gone, thus, leaving you with a great visible appearance, without hair.

Ok, so how long do the hairs need to be?

Only long enough to grasp with tweezers/forceps, less than 1/4 inch.