Purchased 8 reels of these lights. Put them up this Christmas season and within 4 days part of one strand had gone out. Day by day more of the other strands had partially gone out also so by the time Christmas was here I only had partial strands of lights working. Out of the 8 reels all but 2 were only partially working. How can this be resolved? I am thoroughly disappointed and upset for the aggravation and expense I”ve had with these lights. This is the first time theses lights were ever used.