I had seen the reviews that you had to be difficult to de-clip electrodes! Only despite all my attention to ensure smooth disconnect it is very difficult because they are quite heavily clipped, and it tends to be forced to pull it ... In short two weeks of use several times each days, 4 nipples are already gone! I told myself that despite my efforts to make delicately, 4 electrodes every two weeks, it would cost me dear electrodes! He had to find a way to un-clip the smooth, I finally found an idea that turned out to be very good the first tests, I therefore transmits to those like me who are looking for solutions to the fragility of these nipples ... and Compex clips because they tend to get out of their plastic cover when pulled over for too un-clipped !!! which I imagine must cut the cable in the long! In short, I took a screwdriver rather thin and I did gently pass between the clip and the electrode pin, and by slightly rotating the electrode is un-clipped smoothly, without having forced on electrode or the clip! By cons, if you place the electrodes in areas of your body difficult to access by yourself, unless you have a good soul to help you, to me, the least risky is to take off the electrode, or both electrodes (users will understand), then the un-clip with the screwdriver by having in hand, as un-clip on the back or buttocks! except for contortionists, it's hot .... !!!!