Help My AC line voltage is 128V

I have recently tested the line voltage reading out from my AC lines. They read 128V ! Knowing that 128V is almost 10% more than the standard 117V and most components inside the equipments have a 5% tolerance only. Would this unusual high voltage damage my equipments? Even though I have all my stuffs hooked onto a delicated line but when my wife uses the washing machine, the power reading jump slight up and down... This is a power spike at a high 128V... Sounds dangerous to me... I now have a habit of unplugging them everytime I finished and I am getting frustrated at this. Will getting a voltage stabilizer help? PS Audio P600 or the Monster Cable stuff?