I have used my zapper one week in a row and sometimes using special drivers like bacteria,viruses ,fungi etc which is a long duration programes (78 mins) , I started to feel muscle ache and cramp like feeling in my left leg which increases on the onset of zapping ,so I decided to take 1/8 teaspoon of Epson Salt disolved in a glass of water ,twice a day for 3 days and this cleared the problem. any body had a similar problem?