tHIS IS MY SECOND ONE - ONLY JUST WARMS UP - WONT EVEN STRAIGHTEN A KINK. . I RETURNED FIRST ONE FOR SAME REASON - AT THAT TIME I THOUHT WAS A FAULTY ONE BUT PROBLEM STILL EXISTS. I CHARGED ACCORDING TO INSTRUCTIONS FOR 12 HOURS AND COUPLE DYS LATER FOR 3 HOURS. RESULTS STILL THE SAME