The new “Flex Straps” have 50% more conductivity in the “Blue cotton” elastic. This means the blue straps are 50% more efficient in carrying the frequencies than the old Vinyl straps. Some people will now feel the ‘static’ energy of the frequencies over the whole foot, rather than just under the foot. My advise is to place a handkerchief or a strip of cotton sheet under the blue part of the strap, where it touches the upper foot. Do not cover the stainless steel plate. This will remove the frequency contact of the blue flex strap at the top and sides of the feet.